Long-Bridged Salen Catalyst

ABSTRACT

Catalysts comprising long-bridged salen ligands comprising an imino-phenylene-alkylene-imino or an imino-napthalenylene-alkylene-imino bridged salen compound. Also, catalyst systems comprising the catalyst and an activator; methods to prepare the ligands, catalysts and catalyst systems; processes to polymerize olefins using the catalysts and/or catalyst systems; and the olefin polymers prepared according to the processes.

RELATED APPLICATION

This application claims priority to and the benefit of provisional application US 61/837,569 filed Jun. 20, 2013, which is incorporated by reference herein in its entirety.

FIELD OF THE INVENTION

This invention relates to novel catalyst compounds and catalyst systems comprising such, methods of preparing such, uses thereof, and products obtained thereby.

BACKGROUND OF THE INVENTION

Olefin polymerization catalysts are of great use in industry. Hence there is interest in finding new catalyst systems that increase the commercial usefulness of the catalyst and allow the production of polymers having improved properties.

There is a need in the art for new and improved catalysts and catalyst systems to obtain new and improved polyolefins, polymerization processes, and the like. Accordingly, there is a need in the art for new and improved catalyst systems for the polymerization of olefins for one or more of the following purposes: to achieve one or more specific polymer properties, such as high polymer melting point and/or high polymer molecular weights; to increase conversion or comonomer incorporation; and/or to alter comonomer distribution without deterioration of the properties of the resulting polymer.

SUMMARY OF THE INVENTION

The instant disclosure is directed to catalyst compounds, catalyst systems comprising such compounds, processes for the preparation of the catalyst compounds and systems, processes for the polymerization of olefins using such catalyst compounds and systems, and the polyolefins obtained from such processes. In an embodiment according to the invention, the catalyst compound comprises Group 3, 4, 5 and/or 6 disubstituted compounds supported by a multidentate long-bridged salen ligand system coordinated with the metal. In another embodiment according to the invention, the catalyst compound comprises Group 3, 4, 5 and/or 6 disubstituted compounds supported by a multidentate imino-phenylene-alkylene-imino salen ligand system or an imino-naphthalenylene-alkylene-imino salen ligand system, coordinated with the metal.

The invention relates to a catalyst compound represented by the formula:

-   -   wherein each solid line represents a covalent bond and each         dashed line represents a bond having varying degrees of         covalency and a varying degree of coordination;     -   wherein M is a Group 3, 4, 5 or 6 transition metal;     -   wherein N¹ and N² are nitrogen and O¹ and O² are oxygen;     -   wherein n is 1 or 2;     -   wherein each X is, independently, a univalent C₁ to C₂₀         hydrocarbyl radical, a functional group comprising elements from         Groups 13-17 of the periodic table of the elements, or where n         is 2 each X may join together to form a C₄ to C₆₂ cyclic or         polycyclic ring structure;     -   wherein Y comprises an sp³ carbon directly bonded to N² and is         selected from the group consisting of divalent C₁ to C₄₀         hydrocarbyl radicals, divalent functional groups comprising         elements from Groups 13-17 of the periodic table of the         elements, and combinations thereof;     -   wherein each of R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, R¹¹ and         R¹² is, independently, a hydrogen, a C₁-C₄₀ hydrocarbyl radical,         a functional group comprising elements from Group 13-17 of the         periodic table of the elements, or two or more of R¹ to R¹² may         independently join together to form a C₄ to C₆₂ cyclic or         polycyclic ring structure.

The invention also relates to a catalyst compound represented by the formula:

-   -   wherein N¹ and N² are nitrogen and O¹ and O² are oxygen and         comprising [O¹,N¹,N²]—[N¹,N²,O²] in a fac-mer arrangement or a         mer-fac arrangement or a fac-fac arrangement;     -   wherein each solid line represents a covalent bond and each         dashed line represents a bond having varying degrees of         covalency and a varying degree of coordination;     -   wherein M is a Group 4, 5 or 6 transition metal;     -   wherein each of X¹ and X² is, independently, a univalent C₁ to         C₂₀ hydrocarbyl radical, a functional group comprising elements         from Groups 13-17 of the periodic table of the elements, or X¹         and X² join together to form a C₄ to C₆₂ cyclic or polycyclic         ring structure;     -   wherein Y comprises an sp³ carbon directly bonded to N² and is         selected from the group consisting of divalent C₁ to C₄₀         hydrocarbyl radicals, divalent functional groups comprising         elements from Groups 13-17 of the periodic table of the         elements, and combinations thereof;     -   wherein each of R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, R¹¹ and         R¹² is, independently, a hydrogen, a C₁-C₄₀ hydrocarbyl radical,         a functional group comprising elements from Group 13-17 of the         periodic table of the elements, or two or more of R¹ to R¹² may         independently join together to form a C₄ to C₆₂ cyclic or         polycyclic ring structure.

This invention also relates to catalyst systems comprising such compounds, processes for the preparation of the catalyst compounds and systems, processes for the polymerization of olefins using such catalyst compounds and systems and the polyolefins obtained from such processes.

BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a representation of molecular structure as determined by single crystal X-ray diffraction according to the embodiment of Example 4-Ti(O-i-Pr)₂ according to the invention;

FIG. 2 is a representation of molecular structure as determined by single crystal X-ray diffraction according to the embodiment of Example 10-Zr(O-tert-Bu)₂ according to the invention;

FIG. 3 is a representation of molecular structure as determined by single crystal X-ray diffraction according to the embodiment of Example 10-Ti(O-i-Pr)₂ according to the invention;

FIG. 4 is a representation of molecular structure as determined by single crystal X-ray diffraction according to the embodiment of Example 10-Hf(Bn)₂ according to the invention;

FIG. 5 is a representation of molecular structure according to FIG. 4 with the phenyl group of each of the benzyl groups omitted for clarity; and

FIG. 6 is a representation of molecular structure as determined by single crystal X-ray diffraction according to the embodiment of Example 25-Ti(O-i-Pr)₂ according to the invention.

DETAILED DESCRIPTION

For the purposes of this invention and the claims thereto, the new numbering scheme for the Periodic Table Groups is used as described in Chem. Eng. News, 1985, 63, 27. Therefore, a “Group 4 metal” is an element from Group 4 of the Periodic Table, e.g., Hf, Ti or Zr.

In the structures depicted throughout this specification and the claims, a solid line indicates a bond; a double line indicates a double bond or an aromatic bond (as between the bridge carbon atoms with substituents R¹¹ and R¹² in the formulae shown below); and each dashed line represents a bond having varying degrees of covalency and a varying degree of coordination.

The terms “hydrocarbyl radical,” “hydrocarbyl” and “hydrocarbyl group” are used interchangeably throughout this document unless otherwise specified. For purposes of this disclosure, a hydrocarbyl radical is defined to be C₁ to C₇₀ radicals, or C₁ to C₂₀ radicals, or C₁ to C₁₀ radicals, or C₆ to C₇₀ radicals, or C₆ to C₂₀ radicals, or C₇ to C₂₀ radicals that may be linear, branched, or cyclic where appropriate (aromatic or non-aromatic); and includes hydrocarbyl radicals substituted with other hydrocarbyl radicals and/or one or more functional groups comprising elements from Groups 13-17 of the periodic table of the elements. In addition two or more such hydrocarbyl radicals may together form a fused ring system, including partially or fully hydrogenated fused ring systems, which may include heterocyclic radicals.

The term “substituted” means that a hydrogen atom and/or a carbon atom in the base structure has been replaced with a hydrocarbyl radical, and/or a functional group, and/or a heteroatom or a heteroatom containing group. Accordingly, the term hydrocarbyl radical includes heteroatom containing groups. For purposes herein, a heteroatom is defined as any atom other than carbon and hydrogen. For example, methyl cyclopentadiene (Cp) is a Cp group, which is the base structure, substituted with a methyl radical, which may also be referred to as a methyl functional group, ethyl alcohol is an ethyl group, which is the base structure, substituted with an —OH functional group, and pyridine is a phenyl group having a carbon in the base structure of the benzene ring substituted with a nitrogen atom.

For purposes herein, a hydrocarbyl radical may be independently selected from substituted or unsubstituted methyl, ethyl, ethenyl and isomers of propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, nonadecyl, eicosyl, heneicosyl, docosyl, tricosyl, tetracosyl, pentacosyl, hexacosyl, heptacosyl, octacosyl, nonacosyl, triacontyl, propenyl, butenyl, pentenyl, hexenyl, heptenyl, octenyl, nonenyl, decenyl, undecenyl, dodecenyl, tridecenyl, tetradecenyl, pentadecenyl, hexadecenyl, heptadecenyl, octadecenyl, nonadecenyl, eicosenyl, heneicosenyl, docosenyl, tricosenyl, tetracosenyl, pentacosenyl, hexacosenyl, heptacosenyl, octacosenyl, nonacosenyl, triacontenyl, propynyl, butynyl, pentynyl, hexynyl, heptynyl, octynyl, nonynyl, decynyl, undecynyl, dodecynyl, tridecynyl, tetradecynyl, pentadecynyl, hexadecynyl, heptadecynyl, octadecynyl, nonadecynyl, eicosynyl, heneicosynyl, docosynyl, tricosynyl, tetracosynyl, pentacosynyl, hexacosynyl, heptacosynyl, octacosynyl, nonacosynyl, and triacontynyl.

For purposes herein, hydrocarbyl radicals may also include isomers of saturated, partially unsaturated and aromatic cyclic structures wherein the radical may additionally be subjected to the types of substitutions described above. The term “aryl”, “aryl radical”, and/or “aryl group” refers to aromatic cyclic structures, which may be substituted with hydrocarbyl radicals and/or functional groups as defined herein. Examples of aryl radicals include: acenaphthenyl, acenaphthylenyl, acridinyl, anthracenyl, benzanthracenyl, benzimidazolyl, benzisoxazolyl, benzofluoranthenyl, benzofuranyl, benzoperylenyl, benzopyrenyl, benzothiazolyl, benzothiophenyl, benzoxazolyl, benzyl, carbazolyl, carbolinyl, chrysenyl, cinnolinyl, coronenyl, cyclohexyl, cyclohexenyl, methylcyclohexyl, dibenzoanthracenyl, fluoranthenyl, fluorenyl, furanyl, imidazolyl, indazolyl, indenopyrenyls, indolyl, indolinyl, isobenzofuranyl, isoindolyl, isoquinolinyl, isoxazolyl, methyl benzyl, methylphenyl, naphthyl, oxazolyl, phenanthrenyl, phenyl, purinyl, pyrazinyl, pyrazolyl, pyrenyl, pyridazinyl, pyridinyl, pyrimidinyl, pyrrolyl, quinazolinyl, quinolonyl, quinoxalinyl, thiazolyl, thiophenyl, and the like.

It is to be understood that for purposes herein, when a radical is listed, it indicates that the base structure of the radical (the radical type) and all other radicals formed when that radical is subjected to the substitutions defined above. Alkyl, alkenyl, and alkynyl radicals listed include all isomers including where appropriate cyclic isomers, for example, butyl includes n-butyl, 2-methylpropyl, 1-methylpropyl, tert-butyl, and cyclobutyl (and analogous substituted cyclopropyls); pentyl includes n-pentyl, cyclopentyl, 1-methylbutyl, 2-methylbutyl, 3-methylbutyl, 1-ethylpropyl, and nevopentyl (and analogous substituted cyclobutyls and cyclopropyls); butenyl includes E and Z forms of 1-butenyl, 2-butenyl, 3-butenyl, 1-methyl-1-propenyl, 1-methyl-2-prop enyl, 2-methyl-1-propenyl, and 2-methyl-2-propenyl (and cyclobutenyls and cyclopropenyls). Cyclic compounds having substitutions include all isomer forms, for example, methylphenyl would include ortho-methylphenyl, meta-methylphenyl and para-methylphenyl; dimethylphenyl would include 2,3-dimethylphenyl, 2,4-dimethylphenyl, 2,5-dimethylphenyl, 2,6-diphenylmethyl, 3,4-dimethylphenyl, and 3,5-dimethylphenyl.

Likewise the terms “functional group”, “group” and “substituent” are also used interchangeably throughout this document unless otherwise specified. For purposes herein, a functional group includes both organic and inorganic radicals and moieties comprising elements from Groups 13, 14, 15, 16, and 17 of the periodic table of elements. Suitable functional groups may include hydrocarbyl radicals, e.g., alkyl radicals, alkene radicals, aryl radicals, and/or halogen (Cl, Br, I, F), also referred to herein as “halo”, O, S, Se, Te, NR*_(x), OR*, SeR*, TeR*, PR*_(x), AsR*_(x), SbR*_(x), SR*, BR*_(x), SiR*_(x), GeR*_(x), SnR*_(x), PbR*_(x), and/or the like, wherein R* is a C₁ to C₂₀ hydrocarbyl as defined above and wherein x is the appropriate integer to provide an electron neutral moiety. Other examples of functional groups include those typically referred to as amines, imides, amides, ethers, alcohols (hydroxides), sulfides, sulfates, phosphides, halides, phosphonates, alkoxides, esters, carboxylates, aldehydes, and the like.

For purposes herein “direct bonds,” “direct covalent bonds” or “directly bridged” are used interchangeably to refer to covalent bonds directly between atoms that do not have any intervening atoms.

For purposes herein an “olefin,” alternatively referred to as “alkene,” is a linear, branched, or cyclic compound comprising carbon and hydrogen having at least one double bond. For purposes of this specification and the claims appended thereto, when a polymer or copolymer is referred to as comprising an olefin, the olefin present in such polymer or copolymer is the polymerized form of the olefin. For example, when a copolymer is said to have an “ethylene” content of 35 wt % to 55 wt %, it is understood that the mer unit in the copolymer is derived from ethylene in the polymerization reaction and said derived units are present at 35 wt % to 55 wt %, based upon the weight of the copolymer.

For purposes herein a “polymer” has two or more of the same or different “mer” units. A “homopolymer” is a polymer having mer units that are the same. A “copolymer” is a polymer having two or more mer units that are different from each other. A “terpolymer” is a polymer having three mer units that are different from each other. “Different” in reference to mer units indicates that the mer units differ from each other by at least one atom or are different isomerically. Accordingly, the definition of copolymer, as used herein, includes terpolymers and the like. An oligomer is typically a polymer having a low molecular weight, such as an Mn of less than 25,000 g/mol, or in an embodiment according to the invention less than 2,500 g/mol, or a low number of mer units, such as 75 mer units or less. An “ethylene polymer” or “ethylene copolymer” is a polymer or copolymer comprising at least 50 mole % ethylene derived units, a “propylene polymer” or “propylene copolymer” is a polymer or copolymer comprising at least 50 mole % propylene derived units, and so on.

For the purposes of this disclosure, the term “α-olefin” includes C₂-C₂₂ olefins. Non-limiting examples of α-olefins include ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 1-heptene, 1-octene, 1-nonene, 1-decene, 1-undecene 1-dodecene, 1-tridecene, 1-tetradecene, 1-pentadecene, 1-hexadecene, 1-heptadecene, 1-octadecene, 1-nonadecene, 1-eicosene, 1-heneicosene, 1-docosene, 1-tricosene, 1-tetracosene, 1-pentacosene, 1-hexacosene, 1-heptacosene, 1-octacosene, 1-nonacosene, 1-triacontene, 4-methyl-1-pentene, 3-methyl-1-pentene, 5-methyl-1-nonene, 3,5,5-trimethyl-1-hexene, vinylcyclohexane, and vinylnorbornane. Non-limiting examples of cyclic olefins and diolefins include cyclopropene, cyclobutene, cyclopentene, cyclohexene, cycloheptene, cyclooctene, cyclononene, cyclodecene, norbornene, 4-methylnorbornene, 2-methylcyclopentene, 4-methylcyclopentene, vinylcyclohexane, norbornadiene, dicyclopentadiene, 5-ethylidene-2-norbornene, vinylcyclohexene, 5-vinyl-2-norbornene, 1,3-divinylcyclopentane, 1,2-divinylcyclohexane, 1,3-divinylcyclohexane, 1,4-divinylcyclohexane, 1,5-divinylcyclooctane, 1-allyl-4-vinylcyclohexane, 1,4-diallylcyclohexane, 1-allyl-5-vinylcyclooctane, and 1,5-diallylcyclooctane.

The terms “catalyst”, “catalyst compound”, and “transition metal compound” are defined to mean a compound capable of initiating polymerization catalysis under the appropriate conditions. In the description herein, the catalyst may be described as a catalyst precursor, a pre-catalyst compound, or a transition metal compound, and these terms are used interchangeably. A catalyst compound may be used by itself to initiate catalysis or may be used in combination with an activator to initiate catalysis. When the catalyst compound is combined with an activator to initiate catalysis, the catalyst compound is often referred to as a pre-catalyst or catalyst precursor. A “catalyst system” is combination of at least one catalyst compound, at least one activator, an optional co-activator, and an optional support material, where the system can polymerize monomers to polymer. For the purposes of this invention and the claims thereto, when catalyst systems are described as comprising neutral stable forms of the components it is well understood by one of ordinary skill in the art that the ionic form of the component is the form that reacts with the monomers to produce polymers.

For purposes herein the term “catalyst productivity” is a measure of how many grams of polymer (P) are produced using a polymerization catalyst comprising W g of catalyst (cat), over a period of time of T hours; and may be expressed by the following formula: P(T×W) and expressed in units of gPgcat⁻¹ hr⁻¹. Conversion is the amount of monomer that is converted to polymer product, and is reported as mol % and is calculated based on the polymer yield and the amount of monomer fed into the reactor. Catalyst activity is a measure of how active the catalyst is and is reported as the mass of product polymer (P) produced per mole of catalyst (cat) used (kg P/mol cat).

An “anionic ligand” is a negatively charged ligand which donates one or more pairs of electrons to a metal ion. A “neutral donor ligand” is a neutrally charged ligand which donates one or more pairs of electrons to a metal ion.

A scavenger is a compound that is typically added to facilitate polymerization by scavenging impurities. Some scavengers may also act as activators and may be referred to as co-activators. A co-activator, that is not a scavenger, may also be used in conjunction with an activator in order to form an active catalyst. In an embodiment according to the invention a co-activator can be pre-mixed with the catalyst compound to form an alkylated catalyst compound.

As used herein, Mn is number average molecular weight as determined by proton nuclear magnetic resonance spectroscopy (¹H NMR) unless stated otherwise, Mw is weight average molecular weight determined by gel permeation chromatography (GPC), and Mz is z average molecular weight determined by GPC, wt % is weight percent, and mol % is mole percent. Molecular weight distribution (MWD) is defined to be Mw divided by Mn. Unless otherwise noted, all molecular weight units, e.g., Mw, Mn, Mz, are reported in g/mol.

The following abbreviations may be used through this specification: Me is methyl, Ph is phenyl, Et is ethyl, Pr is propyl, iPr is isopropyl, n-Pr is normal propyl, Bu is butyl, iso-butyl is isobutyl, sec-butyl refers to secondary butyl, tert-butyl, t-butyl, tert-Bu, or t-Bu refers to tertiary butyl, n-butyl is normal butyl, pMe is para-methyl, Bn is benzyl, THF is tetrahydrofuran, Mes is mesityl, also known as 1,3,5-trimethylbenzene, Tol is toluene, TMS is trimethylsilyl, TIBAL is triisobutylaluminum, TNOAL is triisobutyl n-octylaluminum, MAO is methylalumoxane, MOMO is methoxymethoxy (also referred to as methoxymethyl ether), N is nitrogen (including that N^(a), N^(b), N¹, N² are nitrogen) and O is oxygen (including that O^(a), O^(b), O¹, O² are oxygen). Further, N^(a) and N¹, N² and N^(b), O^(a) and O¹, and O^(b) and O² are equivalent and may be used interchangeably between formulae.

For purposes herein whenever a composition, an element or a group of elements is preceded with the transitional phrase “comprising”, it is understood that we also contemplate the same composition or group of elements with transitional phrases “consisting essentially of,” “consisting of”, “selected from the group of consisting of,” or “is” preceding the recitation of the composition, element, or elements and vice versa.

For purposes herein, RT is room temperature, which is defined as 25° C. unless otherwise specified. All percentages are weight percent (wt %) unless otherwise specified.

In the description herein, the salen catalyst may be described as a catalyst precursor, a pre-catalyst compound, a salen catalyst compound or a transition metal compound, and these terms are used interchangeably.

Polypropylene microstructure is determined by ¹³C-NMR spectroscopy, including the concentration of isotactic and syndiotactic dyads ([m] and [r]), triads ([mm] and [rr]), and pentads ([mmmm] and [rrrr]). The designation “m” or “r” describes the stereochemistry of pairs of contiguous propylene groups, “m” referring to meso and “r” to racemic. Samples are dissolved in d₂-1,1,2,2-tetrachloroethane, and spectra recorded at 125° C. using a 100 MHz (or higher) NMR spectrometer. Polymer resonance peaks are referenced to mmmm=21.8 ppm. Calculations involved in the characterization of polymers by NMR are described by F. A. Bovey in Polymer Conformation and Configuration (Academic Press, New York 1969) and J. Randall in Polymer Sequence Determination, ¹³C-NMR Method (Academic Press, New York, 1977).

Melting point (Tm or Tmelt), also referred to as melting temperature, and heat of fusion (Hf) of polymers are determined using differential scanning calorimetry (DSC) on a commercially available instrument (e.g., TA Instruments 2920 DSC). Typically, 6 to 10 mg of molded polymer or plasticized polymer are sealed in an aluminum pan and loaded into the instrument at room temperature. Melting data (first heat) is acquired by heating the sample to at least 30° C. above its melting temperature, typically 220° C. for polypropylene, at a heating rate of 10° C./min. The sample is held for at least 5 minutes at this temperature to destroy its thermal history. Crystallization data are acquired by cooling the sample from the melt to at least 50° C. below the crystallization temperature, typically −50° C. for polypropylene, at a cooling rate of 20° C./min. The sample is held at this temperature for at least 5 minutes, and finally heated at 10° C./min to acquire additional melting data (second heat). The endothermic melting transition (first and second heat) and exothermic crystallization transition are analyzed according to standard procedures. The melting temperatures reported are the peak melting temperatures from the second heat unless otherwise specified.

For polymers displaying multiple peaks, the melting temperature is defined to be the peak melting temperature from the melting trace associated with the largest endothermic calorimetric response (as opposed to the peak occurring at the highest temperature). Areas under the DSC curve are used to determine the heat of transition (heat of fusion, H_(f), upon melting), which can be used to calculate the degree of crystallinity (also called the percent crystallinity). The percent crystallinity (X %) is calculated using the formula: [area under the curve (in J/g)/H° (in J/g)]*100, where H° is the ideal heat of fusion for a perfect crystal of the homopolymer of the major monomer component. These values for H° are to be obtained from the Polymer Handbook, Fourth Edition, published by John Wiley and Sons, New York 1999, except that a value of 290 J/g is used for H° (polyethylene), a value of 140 J/g is used for H° (polybutene), and a value of 207 J/g is used for H° (polypropylene).

For purposes herein, a chiral carbon is indicated by a C* and/or at least two of the substituents are indicated using the flying wedge and dotted wedge depictions known in the art. For purposes herein, unless otherwise specified, a structure comprising a chiral carbon, whether expressly indicated or not, includes the enantiomerically pure compound or compounds in the case of multiple chiral carbons, the racemic mixture of compounds, or a combination thereof, including racemic mixtures combined with enantiomerically pure isomers in the case of multiple chiral carbons present in the same molecule.

For purposes herein, a bulky ligand substitution on an imino-phenylene-alkylene-imino salen catalyst compound (e.g., imino-benzylimine salen catalyst compound when the alkylene group is methylene) is defined as a C₄ to C₂₀ hydrocarbyl radical; —SR^(a), —NR^(a) ₂ and —PR^(a) ₂, where each R^(a) is independently a C₄ to C₂₀ hydrocarbyl; or a C₄ to C₂₀ hydrocarbyl substituted organometalloid. The molecular volume of a substituent is used herein as an approximation of spatial steric bulk. Comparison of substituents with differing molecular volumes allows the substituent with the smaller molecular volume to be considered “less bulky” in comparison to the substituent with the larger molecular volume. Conversely, a substituent with a larger molecular volume may be considered “more bulky” than a substituent with a smaller molecular volume.

Molecular volume may be calculated as reported in “A Simple ‘Back of the Envelope’Method for Estimating the Densities and Molecular Volumes of Liquids and Solids,” Journal of Chemical Education, Vol. 71, No. 11, November 1994, pp. 962-964. Molecular volume (MV), in units of cubic Å, is calculated using the formula: MV=8.3Vs, where Vs is the scaled volume. Vs is the sum of the relative volumes of the constituent atoms, and is calculated from the molecular formula of the substituent using the following table of relative volumes. For fused rings, the Vs is decreased by 7.5% per fused ring.

Element Relative Volume, Å (Vs) H 1 1^(st) short period, Li to F 2 2^(nd) short period, Na to Cl 4 1^(st) long period, K to Br 5 2^(nd) long period, Rb to I 7.5 3^(rd) long period, Cs to Bi 9

For purposes herein, a bulky substituent is defined as any substituent having a molecular volume greater than or equal to a tertiary-butyl substitution (MV=8.3Vs=141.1). Examples of other suitable bulky substituents include adamantyl, halo substituted and unsubstituted aryl functional groups, and the like.

For purposes herein, a long-bridged salen catalyst compound refers to a tetradentate ligand system comprising a first arm connected to a second arm by a bridge an imino-alkenylene-alkylene-imino, wherein the bridge comprises a backbone of at least 3 carbon atoms, e.g., an imino-phenylene-alkylene-imino bridge is an imino-benzylimine salen when the alkylene is methylene. In embodiments according to the invention the first arm comprises an imine-phenolate moiety bound to an olefinic or aromatic carbon (sp²) of the bridge, e.g., the imino portion of the imino-phenylene-alkylene-imino bridge embodiment, and the second arm comprises an imine-phenolate moiety bound to an aliphatic (sp³) carbon atom, e.g., the alkylene-imine portion of the imino-phenylene-alkylene-imino bridge embodiment. Accordingly, the bridge between the two imino-phenolate ligand arms is asymmetric.

As shown below, the long-bridged or imino-phenylene-alkylene-imino bridged salen ligand system includes [O^(a),N^(a),N^(b),O^(b)] where O^(a) and N^(a) are attached to a first arm of the ligand, N^(b)) and O^(b) are attached to a second arm of the ligand, and the first and second ligands are attached to each other by a bridge moiety Y between N^(a) and N^(b) (O=oxygen and N=nitrogen). Each of O^(a), N^(a), N^(b), and O^(b) are coordinated with the metal atom. For purposes herein a long-bridged salen catalyst compound has one of the general structures I or II:

wherein each solid line represents a covalent bond and each dashed line represents a bond having varying degrees of covalency and a varying degree of coordination and where R¹ to R¹², M, n, X¹, X² and Y are as described below.

For purposes herein, a “fac” (facial) configuration refers to a salen ligand structure (II) where O^(a) and/or O^(b) is not in the [N^(a),N^(b),M] plane in a six-coordinated arrangement centered around the metal atom, or stated differently, all three of the atoms [O^(a),N^(a),N^(b)] and/or all three of the atoms [N^(a),N^(b),O^(b)] are on the same side ([O^(a), N^(b)] and [N^(a),O^(b)] are located cis); whereas in a “mer” (meridional) configuration, O^(a) and/or O^(b) are in the [N^(a),N^(b),M] plane, or stated differently, O^(a) is on the opposite side of the metal center (located trans) with respect to N^(b) and/or O^(b) is on the opposite side of the metal center or trans with respect to N^(a). For purposes herein, in the binary wrapping mode designations, the configuration of [O^(a),N^(a),N^(b)] is stated first and [N^(a),N^(b),O^(b)] second, e.g., “fac-mer” refers to fac [O^(a),N^(a),N^(b)] and mer [N^(a),N^(b),O^(b)].

The four arrangements of the O^(a)—N^(a)—N^(b)—O^(b) salen catalyst compounds which are possible are: mer-mer, also referred to in the art as trans with respect to the labile groups X¹ and X²; fac-fac, also referred to in the art as cis-alpha; and fac-mer and mer-fac, both of which are generally referred to as cis-beta, but which are actually different isomers as illustrated below.

Catalyst Compounds

In an embodiment according to the invention, the catalyst comprises Group 3, 4, 5 and/or 6 dialkyl compounds supported by a tetradentate di-anionic long-bridged salen ligand, and in embodiments according to the invention may be useful to polymerize olefins and/or α-olefins to produce polyolefins and/or poly(α-olefins).

In an embodiment according to the invention, the catalyst compounds are represented by the formula:

wherein each solid line represents a covalent bond and each dashed line represents a bond having varying degrees of covalency and a varying degree of coordination; wherein M is a Group 3, 4, 5 or 6 transition metal; wherein N¹ and N² are nitrogen and O¹ and O² are oxygen; wherein n is 1 or 2; wherein each X is, independently, a univalent C₁ to C₂₀ hydrocarbyl radical, a functional group comprising elements from Groups 13-17 of the periodic table of the elements, or where n is 2 each X may join together to form a C₄ to C₆₂ cyclic or polycyclic ring structure; wherein Y comprises an sp³ carbon directly bonded to N² and is selected from the group consisting of divalent C₁ to C₄₀ hydrocarbyl radicals, divalent functional groups comprising elements from Groups 13-17 of the periodic table of the elements, and combinations thereof; wherein each of R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, R¹¹ and R¹² is, independently, a hydrogen, a C₁-C₄₀ hydrocarbyl radical, a functional group comprising elements from Group 13-17 of the periodic table of the elements, or two or more of R¹ to R¹² may independently join together to form a C₄ to C₆₂ cyclic or polycyclic ring structure.

In a particular embodiment according to the invention, the catalyst compounds are represented by the formula:

comprising [O¹,N¹,N²]—[N¹,N²,O²] in a fac-mer arrangement or a mer-fac arrangement; wherein each solid line represents a covalent bond and each dashed line represents a bond having varying degrees of covalency and a varying degree of coordination; wherein M is a Group 4, 5 or 6 transition metal; wherein N¹ and N² are nitrogen and O¹ and O² are oxygen; wherein each of X¹ and X² is, independently, a univalent C₁ to C₂₀ hydrocarbyl radical, a functional group comprising elements from Groups 13-17 of the periodic table of the elements, or X¹ and X² join together to form a C₄ to C₆₂ cyclic or polycyclic ring structure; wherein Y comprises an sp³ carbon directly bonded to N² and is selected from the group consisting of divalent C₁ to C₄₀ hydrocarbyl radicals, divalent functional groups comprising elements from Groups 13-17 of the periodic table of the elements, and combinations thereof; wherein each of R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, R¹¹ and R¹² is, independently, a hydrogen, a C₁-C₄₀ hydrocarbyl radical, a functional group comprising elements from Group 13-17 of the periodic table of the elements, or two or more of R¹ to R¹² may independently join together to form a C₄ to C₆₂ cyclic or polycyclic ring structure.

According to a particular embodiment according to the invention, M is Ti, Hf or Zr. In one embodiment, M is Ti. In an embodiment according to the invention, X¹ and X² is each a benzyl radical or a halogen radical.

In an embodiment according to the invention, each R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, R¹¹, and R¹² is, independently, hydrogen, a halogen, or a C₁ to C₃₀ hydrocarbyl radical.

In an embodiment according to the invention, each R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, R¹¹, and R¹² is, independently, hydrogen, a halogen, or a C₁ to C₁₀ hydrocarbyl radical.

According to a particular embodiment, the sp3 carbon directly bonded to N² is a benzylic carbon. In an embodiment according to the invention, Y is a divalent aliphatic radical having from 1 to 10 carbon atoms.

According to a particular embodiment of the invention, the catalyst compound is an imino-phenylene-alkylene-imino bridged salen ligand system coordinated with the metal, wherein R¹¹ and R¹² join to form a phenylene ring directly bonded to N¹ and the alkylene group or moiety Y is bonded to the phenylene ring and to N², as represented by the formulae:

wherein M, n, X, X¹, and X² are as described above; and wherein each of R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, R¹³, R¹⁴, R¹⁵, and R¹⁶ is independently, a hydrogen, a C₁-C₄₀ hydrocarbyl radical, a functional group comprising elements from Group 13-17 of the periodic table of the elements, or two or more of R¹ to R¹⁰ and R¹³ to R¹⁶ may independently join together to form a C₄ to C₆₂ cyclic or polycyclic ring structure.

According to a particular embodiment according to the invention, the catalyst is represented by the formulae:

wherein M, n. X, X¹, and X² are as described above; and wherein each of R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, R¹³, R¹⁴, R¹⁵, R¹⁶, R¹⁷, and R¹⁸ is independently, a hydrogen, a C₁-C₄₀ hydrocarbyl radical, a functional group comprising elements from Group 13-17 of the periodic table of the elements, or two or more of R¹ to R¹⁰ and R¹³ to R¹⁸ may independently join together to form a C₄ to C₆₂ cyclic or polycyclic ring structure.

According to a particular embodiment according to the invention, R¹⁴ and R¹⁵ of the phenylene moiety join to form a 2,3-naphthalenylene ring directly bonded to N² and Y to form an imino-naphthalenylene-alkylene-imino bridged salen compound, represented by the formula:

wherein each of R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, R¹³, R¹⁶, R¹⁹, R²⁰, R²¹, and R²² is independently, a hydrogen, a C₁-C₄₀ hydrocarbyl radical, a functional group comprising elements from Group 13-17 of the periodic table of the elements, or two or more of R¹ to R¹⁰ and R¹³ to R¹⁶ may independently join together to form a C₄ to C₆₂ cyclic or polycyclic ring structure.

In a particular embodiment according to the invention: X¹ and X² are benzyl radicals; at least one of R¹, R², R⁴, R⁵, R⁷, and R⁸ are independently selected from the group consisting of: C₁-C₁₀ alkyl, C₁-C₁₀ cycloalkyl, C₁-C₁₀ alkenyl C₁-C₁₀ alkoxy, aryl substituted C₁-C₁₀ alkyl, C₁-C₁₀ aryl, halo, and combinations thereof; and R³, R⁶, R⁹, R¹⁰, R¹³, R¹⁴, R¹⁵, R¹⁶, R¹⁷ and R¹⁸ are hydrogen.

In a particular embodiment according to the invention, at least one of R¹, R², R⁴, R⁵, R⁷, and R⁸ are independently selected from the group consisting of: methyl, ethyl, isopropyl, isobutyl, tertiary-butyl, isopentyl, 2-methyl-2-phenylethyl; methoxy, benzyl, adamantyl, chloro, bromo, iodo, and combinations thereof.

In a particular embodiment according to the invention, R² and R⁴ are identical, R⁵ and R⁷ are identical, or a combination thereof.

In an embodiment according to the invention, a catalyst system comprises: an activator and a catalyst compound represented by the formula:

wherein each solid line represents a covalent bond and each dashed line represents a bond having varying degrees of covalency and a varying degree of coordination; wherein M is a Group 3, 4, 5 or 6 transition metal; wherein N¹ and N² are nitrogen and O¹ and O² are oxygen; wherein n is 1 or 2; wherein each X is, independently, a univalent C₁ to C₂₀ hydrocarbyl radical, a functional group comprising elements from Groups 13-17 of the periodic table of the elements, or where n is 2 each X may join together to form a C₄ to C₆₂ cyclic or polycyclic ring structure; wherein Y comprises an sp³ carbon directly bonded to N² and is selected from the group consisting of divalent C₁ to C₄₀ hydrocarbyl radicals, divalent functional groups comprising elements from Groups 13-17 of the periodic table of the elements, and combinations thereof; wherein each of R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, R¹¹ and R¹² is, independently, a hydrogen, a C₁-C₄₀ hydrocarbyl radical, a functional group comprising elements from Group 13-17 of the periodic table of the elements, or two or more of R¹ to R¹² may independently join together to form a C₄ to C₆₂ cyclic or polycyclic ring structure.

In an embodiment according to the invention, a catalyst system comprises: an activator and a catalyst compound represented by the formula:

comprising [O¹,N¹,N²]—[N¹,N²,O²] in a fac-mer arrangement or a mer-fac arrangement, or wherein activation of the catalyst compound rearranges [O¹,N¹,N²]—[N¹N²,O²] into a fac-mer arrangement or a mer-fac arrangement; wherein each solid line represents a covalent bond and each dashed line represents a bond having varying degrees of covalency and a varying degree of coordination; wherein M is a Group 3, 4, 5 or 6 transition metal; wherein N¹ and N² are nitrogen and O¹ and O² are oxygen; wherein each of X¹ and X² is, independently, a univalent C₁ to C₂₀ hydrocarbyl radical, a functional group comprising elements from Groups 13-17 of the periodic table of the elements, or X¹ and X² join together to form a C₄ to C₆₂ cyclic or polycyclic ring structure; wherein Y comprises an sp³ carbon directly bonded to N² and is selected from the group consisting of divalent C₁ to C₄₀ hydrocarbyl radicals, divalent functional groups comprising elements from Groups 13-17 of the periodic table of the elements, and combinations thereof; wherein each of R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, R¹¹, and R¹² is, independently, a hydrogen, a C₁-C₄₀ hydrocarbyl radical, a functional group comprising elements from Group 13-17 of the periodic table of the elements, or two or more of R¹ to R¹² may independently join together to form a C₄ to C₆₂ cyclic or polycyclic ring structure.

In a particular embodiment according to the invention, the catalyst system comprises [O¹,N¹,N²]—[N¹,N²,O²] in a fac-mer arrangement; or wherein activation rearranges [O¹,N¹,N²]—[N¹,N²,O²] into a fac-mer arrangement.

In an embodiment according to the invention, the activator comprises alumoxane, a non-coordinating anion activator or a combination thereof. In a particular embodiment, the activator comprises alumoxane and the alumoxane is present at a ratio of 1 mole aluminum or more per mole of catalyst compound.

In a particular embodiment according to the invention, the activator is represented by the formula: (Z)_(d) ⁺(A^(d−)) wherein Z is (L-H), or a reducible Lewis Acid, wherein L is a neutral Lewis base, H is hydrogen and (L-H)⁺ is a Bronsted acid; A^(d−) is a non-coordinating anion having the charge d⁻; and d is an integer from 1 to 3.

In an embodiment according to the invention, the activator is represented by the formula: (Z)_(d) ⁺(A^(d−)) wherein A^(d−) is a non-coordinating anion having the charge d⁻; d is an integer from 1 to 3, and Z is a reducible Lewis acid represented by the formula: (Ar₃C⁺), where Ar is aryl radical, an aryl radical substituted with a heteroatom, an aryl radical substituted with one or more C₁ to C₄₀ hydrocarbyl radicals, an aryl radical substituted with one or more functional groups comprising elements from Groups 13-17 of the periodic table of the elements, or a combination thereof.

In an embodiment according to the invention, a process to activate a catalyst system comprises combining an activator with a catalyst compound represented by the formula:

wherein each solid line represents a covalent bond and each dashed line represents a bond having varying degrees of covalency and a varying degree of coordination; wherein M is a Group 3, 4, 5 or 6 transition metal; wherein N¹ and N² are nitrogen and O¹ and O² are oxygen; wherein n is 1 or 2; wherein each X is, independently, a univalent C₁ to C₂₀ hydrocarbyl radical, a functional group comprising elements from Groups 13-17 of the periodic table of the elements, or where n is 2 each X may join together to form a C₄ to C₆₂ cyclic or polycyclic ring structure; wherein Y comprises an sp³ carbon directly bonded to N² and is selected from the group consisting of divalent C₁ to C₄₀ hydrocarbyl radicals, divalent functional groups comprising elements from Groups 13-17 of the periodic table of the elements, and combinations thereof; wherein each of R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, R¹¹ and R¹² is, independently, a hydrogen, a C₁-C₄₀ hydrocarbyl radical, a functional group comprising elements from Group 13-17 of the periodic table of the elements, or two or more of R¹ to R¹² may independently join together to form a C₄ to C₆₂ cyclic or polycyclic ring structure.

In an embodiment according to the invention, a process to activate a catalyst system comprises combining an activator with a catalyst compound represented by the formula:

comprising [O¹,N¹,N²]—[N¹,N²,O²] in a fac-mer arrangement or a mer-fac arrangement or a fac-fac arrangement, or wherein activation rearranges [O¹,N¹,N²]—[N¹,N²,O²] into a fac-mer arrangement or a mer-fac arrangement or a fac-fac arrangement; wherein each solid line represents a covalent bond and each dashed line represents a bond having varying degrees of covalency and a varying degree of coordination; wherein M is a Group 3, 4, 5 or 6 transition metal; wherein N¹ and N² are nitrogen and O¹ and O² are oxygen; wherein each of X¹ and X² is, independently, a univalent C₁ to C₂₀ hydrocarbyl radical, a functional group comprising elements from Groups 13-17 of the periodic table of the elements, or X¹ and X² join together to form a C₄ to C₆₂ cyclic or polycyclic ring structure; wherein Y comprises an sp³ carbon directly bonded to N² and is selected from the group consisting of divalent C₁ to C₄₀ hydrocarbyl radicals, divalent functional groups comprising elements from Groups 13-17 of the periodic table of the elements, and combinations thereof; and wherein each of R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, R¹¹, and R¹² is independently, a hydrogen, a C₁-C₄₀ hydrocarbyl radical, a functional group comprising elements from Group 13-17 of the periodic table of the elements, or two or more of R¹ to R¹² may independently join together to form a C₄ to C₆₂ cyclic or polycyclic ring structure.

Methods to Prepare the Catalyst Compounds.

In an embodiment according to the invention, the transition metal compounds may be prepared by an imine-condensation procedure if an aldehyde located ortho to a hydroxy functional group (e.g., a substituted salicylaldehyde base structure) is used (reaction A). In an embodiment according to the invention where both sides of the salen ligand are identically substituted (R′ is identical to R), two equivalents of the salicylaldehyde may be used. In an embodiment according to the invention where the two sides of the salen ligand are not identically substituted (R′ is not identical to R), two sequential condensation steps may be used. The long-bridged (e.g., imino-phenylene-alkylene-imino bridged) salen ligand, which is imino benzylimine bridged when the alkylene Y moiety is methylene) is then converted into the metal substituted catalyst precursor by reaction with a metalation reagent MX_((n+2)) where n is 1 or 2, e.g., a metal tri- or tetra-substituted compound to yield the finished complex (reaction B1) or into the metal di-substituted catalyst precursor by reaction with a metalation reagent MX₄, e.g., a metal tetra-substituted compound to yield the finished complex (reaction B2).

Reaction A:

Reaction B1:

Reaction B2:

In embodiments according to the invention, the salen ligand may be contacted with the metalation reagent in Reaction B1 or in Reaction B2 to form the catalyst compound prior to combination with the activator, and subsequently the catalyst compound may be contacted with the activator, with or without isolation of the precursor catalyst compound, or the salen ligand and the metalation reagent may be contacted in Reaction B1 or in Reaction B2 in the presence of the activator, in the presence of one or more olefins, or a combination thereof, e.g., in an in situ metalation, activation and/or polymerization process.

In an embodiment according to the invention, the transition metal compounds may comprise salen ligands in which the imino-phenylene-alkylene-imino bridge is modified to comprise a naphthalenylene or larger polycyclic aromatic hydrocarbon moiety (e.g., wherein the imino-phenylene-alkylene-imino bridge moiety comprises at least one additional conjugated phenyl ring, such as, for example, anthracene, a benzopyrene, a benzoperylene, chrysene, phenanthrene, tetracene, triphenylene, and the like). In an embodiment according to the invention, the transition metal compound comprises an imino-phenylene-alkylene-imino bridged salen compound represented by the formula:

wherein the alkylene moiety Y comprises an sp³ carbon directly bonded to N² and is selected from the group consisting of divalent C₁ to C₄₀ hydrocarbyl radicals, divalent functional groups comprising elements from Groups 13-17 of the periodic table of the elements, and combinations thereof; wherein each of R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, R¹³, R¹⁶, R¹⁹, R²⁰, R²¹, and R²² is independently, a hydrogen, a C₁-C₄₀ hydrocarbyl radical, a functional group comprising elements from Group 13-17 of the periodic table of the elements, or two or more of R¹ to R¹⁰ and R¹³ to R¹⁶ may independently join together to form a C₄ to C₆₂ cyclic or polycyclic ring structure.

In an embodiment according to the invention, the phenylene-based bridge is modified to include a naphthalenylene moiety to form a more conjugated bridge which is more electron-withdrawing and has a more crystalline character than the phenylene-based bridge. In an embodiment according to the invention, modifications of the di-imino bridge may be used to obtain an advantage in tuning for a specific catalyst activity and/or desired polymer properties.

In an embodiment according to the invention, 2-aminomethyl-3-aminonaphthalene, which is a commercially available compound, may undergo condensation with 2 equivalents of substituted salicylaldehydes as described herein to form the corresponding long-salen ligand precursor in a single step. In embodiments, modification of the synthetic scheme may also lead to ligands with two different phenol arms. Reacting these ligand precursors with group 4 metal precursors such as MBn₄ (M=Ti, Zr, Hf) as described herein lead to the desired precatalysts in a single step. These precatalysts can be activated by common cocatalysts such as MAO and the like, leading to active catalysts for stereoregular polymerization of alpha-olefins including propylene.

Examples of imino-naphthalenylene-alkylene-imino bridged salen precursors and complexes include:

In an embodiment according to the invention, the long-bridge salen ligand may further comprise ortho-carbazole substituents on the phenol rings; the carbazole substituents being both aromatic and electron withdrawing. In an embodiment according to the invention the long-bridged salen ligand precursor may include carbazole substituents on the two phenol arms, as shown in Reaction C. Modification of the synthetic scheme may lead to long-bridged salen ligand precursor in which one of the phenol arms bears the carbazole substituent and the other phenol arm bears a different substitution pattern. Reacting these ligand precursors with group 4 metal precursors such as MBn₄ (M=Ti, Zr, Hf) as described herein lead to the desired precatalysts in a single step.

Reaction C:

In an embodiment of the invention, the long-bridged salen compound comprises a 2,3 substituted naphthalenylene ring directly bonded to N² and a C₁-C₄₀ alkylene moiety Y to form an imino-naphthalenylene-alkylene-imino bridged salen compound represented by the formula:

comprising [O¹,N¹,N²]—[N¹,N²,O²] in a fac-mer arrangement or a mer-fac arrangement or a fac-fac arrangement;

wherein each solid line represents a covalent bond and each dashed line represents a bond having varying degrees of covalency and a varying degree of coordination;

wherein M is a Group 4, 5 or 6 transition metal;

wherein N¹ and N² are nitrogen and O¹ and O² are oxygen;

wherein each of X¹ and X² is, independently, a univalent C₁ to C₂₀ hydrocarbyl radical, a functional group comprising elements from Groups 13-17 of the periodic table of the elements, or X¹ and X² join together to form a C₄ to C₆₂ cyclic or polycyclic ring structure;

wherein Y comprises an sp³ carbon directly bonded to N² and is selected from the group consisting of divalent C₁ to C₄₀ hydrocarbyl radicals, divalent functional groups comprising elements from Groups 13-17 of the periodic table of the elements, and combinations thereof;

wherein each of R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, R¹³, R¹⁶, R¹⁹, R²⁰, R²¹, and R²² is, independently, a hydrogen, a C₁-C₄₀ hydrocarbyl radical, a functional group comprising elements from Group 13-17 of the periodic table of the elements, or two or more of R¹ to R¹⁰ and R¹³ to R¹⁶ may independently join together to form a C₄ to C₆₂ cyclic or polycyclic ring structure.

Activators

The terms “cocatalyst” and “activator” are used interchangeably to describe activators and are defined to be any compound which can activate any one of the catalyst compounds described above by converting the neutral catalyst compound to a catalytically active catalyst compound cation. Non-limiting activators, for example, include alumoxanes, aluminum alkyls, ionizing activators, which may be neutral or ionic, and conventional-type cocatalysts. Activators may include alumoxane compounds, modified alumoxane compounds, and ionizing anion precursor compounds that abstract a reactive, σ-bound, metal ligand making the metal complex cationic and providing a charge-balancing noncoordinating or weakly coordinating anion.

In one embodiment according to the invention, alumoxane activators are utilized as an activator in the catalyst composition. Alumoxanes are generally oligomeric compounds containing —Al(R¹)—O— sub-units, where R¹ is an alkyl radical. Examples of alumoxanes include methylalumoxane (MAO), modified methylalumoxane (MMAO), ethylalumoxane and isobutylalumoxane. Alkylalumoxanes and modified alkylalumoxanes are suitable as catalyst activators, particularly when the catalyst precursor compound comprises an abstractable ligand which is an alkyl, halide, alkoxide or amide. Mixtures of different alumoxanes and modified alumoxanes may also be used. In an embodiment according to the invention, visually clear methylalumoxane may be used. A cloudy or gelled alumoxane can be filtered to produce a clear solution or clear alumoxane can be decanted from the cloudy solution. A useful alumoxane is a modified methyl alumoxane (MMAO) described in U.S. Pat. No. 5,041,584 and/or commercially available from Akzo Chemicals, Inc. under the trade designation Modified Methylalumoxane type 3A.

When the activator is an alumoxane (modified or unmodified), in an embodiment according to the invention, the maximum amount of activator is typically at a 5000-fold molar excess Al/M over the catalyst compound (per metal catalytic site). In an embodiment according to the invention, the minimum activator-to-catalyst-compound, which is determined according to molar concentration of the transition metal M, in an embodiment according to the invention is 1 mole aluminum or less to mole of transition metal M. In an embodiment according to the invention, the activator comprises alumoxane and the alumoxane is present at a ratio of 1 mole aluminum or more to mole of catalyst compound. In an embodiment according to the invention, the minimum activator-to-catalyst-compound molar ratio is a 1:1 molar ratio. Other embodiments according to the invention of Al:M ranges include from 1:1 to 500:1, or from 1:1 to 200:1, or from 1:1 to 100:1, or from 1:1 to 50:1.

In an embodiment according to the invention, little or no alumoxane (i.e., less than 0.001 wt %) is used in the polymerization processes described herein. In an embodiment according to the invention, alumoxane is present at 0.00 mole %, or the alumoxane is present at a molar ratio of aluminum to catalyst compound transition metal less than 500:1, or less than 300:1, or less than 100:1, or less than 1:1.

The term “non-coordinating anion” (NCA) refers to an anion which either does not coordinate to a cation, or which is only weakly coordinated to a cation thereby remaining sufficiently labile to be displaced by a neutral Lewis base. “Compatible” non-coordinating anions are those which are not degraded to neutrality when the initially formed complex decomposes. Further, the anion will not transfer an anionic substituent or fragment to the cation so as to cause it to form a neutral transition metal compound and a neutral by-product from the anion. Non-coordinating anions useful in accordance with this invention are those that are compatible with the polymerization or catalyst system, stabilize the transition metal cation in the sense of balancing its ionic charge at +1, and yet are sufficiently labile to permit displacement during polymerization.

In an embodiment according to the invention, an ionizing or stoichiometric activator may be used, which may be neutral or ionic, such as tri(n-butyl) ammonium boron metalloid precursor, polyhalogenated heteroborane anions (WO 98/43983), boric acid (U.S. Pat. No. 5,942,459), or a combination thereof. In an embodiment according to the invention, neutral or ionic activators alone or in combination with alumoxane or modified alumoxane activators may be used.

Examples of neutral stoichiometric activators include tri-substituted boron, tellurium, aluminum, gallium, and indium, or mixtures thereof. The three substituent groups or radicals can be the same or different and in an embodiment according to the invention are each independently selected from substituted or unsubstituted alkyls, alkenyls, alkyns, aryls, alkoxy, and halogens. In an embodiment according to the invention, the three groups are independently selected from halogen, mono or multicyclic (including halosubstituted) aryls, alkyls, and alkenyl compounds, and mixtures thereof; or independently selected from alkenyl radicals having 1 to 20 carbon atoms, alkyl radicals having 1 to 20 carbon atoms, alkoxy radicals having 1 to 20 carbon atoms and aryl or substituted aryl radicals having 3 to 20 carbon atoms. In an embodiment according to the invention, the three substituent groups are alkyl radicals having 1 to 20 carbon atoms, phenyl, naphthyl, or mixtures thereof. In an embodiment according to the invention, the three groups are halogenated aryl groups, e.g., fluorinated aryl groups. In an embodiment according to the invention the neutral stoichiometric activator is tris perfluorophenyl boron or tris perfluoronaphthyl boron.

In an embodiment according to the invention, ionic stoichiometric activator compounds may include an active proton, or some other cation associated with, but not coordinated to, or only loosely coordinated to the remaining ion of the ionizing compound. Suitable examples include compounds and the like described in European publications EP 0 570 982 A; EP 0 520 732 A; EP 0 495 375 A; EP 0 500 944 B1; EP 0 277 003 A; EP 0 277 004 A; U.S. Pat. Nos. 5,153,157; 5,198,401; 5,066,741; 5,206,197; 5,241,025; 5,384,299; 5,502,124; and WO 1996/04319; all of which are herein fully incorporated by reference.

In an embodiment according to the invention compounds useful as an activator comprise a cation, which is, for example, a Bronsted acid capable of donating a proton, and a compatible non-coordinating anion which anion is relatively large (bulky), capable of stabilizing the active catalyst species (the Group 4 cation, e.g.) which is formed when the two compounds are combined and said anion will be sufficiently labile to be displaced by olefinic, diolefinic or acetylenically unsaturated substrates or other neutral Lewis bases, such as ethers, amines, and the like. Two classes of useful compatible non-coordinating anions are disclosed in EP 0 277 003 A1, and EP 0 277 004 A1, which include anionic coordination complexes comprising a plurality of lipophilic radicals covalently coordinated to and shielding a central charge-bearing metal or metalloid core; and anions comprising a plurality of boron atoms such as carboranes, metallacarboranes, and boranes.

In an embodiment according to the invention, the stoichiometric activators include a cation and an anion component, and may be represented by the following formula (1):

(Z)_(d) ⁺(A^(d−))  (1)

wherein Z is (L-H) or a reducible Lewis Acid, L is a neutral Lewis base; H is hydrogen; (L-H)⁺ is a Bronsted acid; A^(d−) is a non-coordinating anion having the charge d−; and d is an integer from 1 to 3.

When Z is (L-H) such that the cation component is (L-H)_(d) ⁺, the cation component may include Bronsted acids such as protonated Lewis bases capable of protonating a moiety, such as an alkyl or aryl, from the catalyst precursor, resulting in a cationic transition metal species, or the activating cation (L-H)_(d) ⁺ is a Bronsted acid, capable of donating a proton to the catalyst precursor resulting in a transition metal cation, including ammoniums, oxoniums, phosphoniums, silyliums, and mixtures thereof, or ammoniums of methylamine, aniline, dimethylamine, diethylamine, N-methylaniline, diphenylamine, trimethylamine, triethylamine, N,N-dimethylaniline, methyldiphenylamine, pyridine, p-bromo N,N-dimethylaniline, p-nitro-N,N-dimethylaniline, phosphoniums from triethylphosphine, triphenylphosphine, and diphenylphosphine, oxoniums from ethers, such as dimethyl ether diethyl ether, tetrahydrofuran, and dioxane, sulfoniums from thioethers, such as diethyl thioethers and tetrahydrothiophene, and mixtures thereof.

When Z is a reducible Lewis acid it may be represented by the formula: (Ar₃C⁺), where Ar is aryl or aryl substituted with a heteroatom, or a C₁ to C₄₀ hydrocarbyl, the reducible Lewis acid may be represented by the formula: (Ph₃C⁺), where Ph is phenyl or phenyl substituted with a heteroatom, and/or a C₁ to C₄₀ hydrocarbyl. In an embodiment according to the invention, the reducible Lewis acid is triphenyl carbenium.

Embodiments according to the invention of the anion component A^(d−) include those having the formula [M^(k+)Q_(n)]^(d−) wherein k is 1, 2, or 3; n is 1, 2, 3, 4, 5 or 6, or 3, 4, 5 or 6; n−k=d; M is an element selected from Group 13 of the Periodic Table of the Elements, or boron or aluminum, and Q is independently a hydride, bridged or unbridged dialkylamido, halide, alkoxide, aryloxide, hydrocarbyl radicals, said Q having up to 20 carbon atoms with the proviso that in not more than one occurrence is Q a halide, and two Q groups may form a ring structure. Each Q may be a fluorinated hydrocarbyl radical having 1 to 20 carbon atoms, or each Q is a fluorinated aryl radical, or each Q is a pentafluoryl aryl radical. Examples of suitable A^(d−) components also include diboron compounds as disclosed in U.S. Pat. No. 5,447,895, which is fully incorporated herein by reference.

In an embodiment according to the invention, this invention relates to a method to polymerize olefins comprising contacting olefins (e.g., ethylene and/or propylene) with a long-bridged (e.g., imino-phenylene-alkylene-imino bridged) salen catalyst compound, an optional chain transfer agent (CTA) and a boron containing NCA activator represented by the formula (1) where: Z is (L-H) or a reducible Lewis acid; L is a neutral Lewis base (as further described above); H is hydrogen; (L-H) is a Bronsted acid (as further described above); A^(d−) is a boron containing non-coordinating anion having the charged (as further described above); d is 1, 2, or 3.

In an embodiment according to the invention in any of the NCA's represented by Formula 1 described above, the anion component A^(d−) is represented by the formula [M*^(k*+)Q*_(n*)]^(d*−) wherein k* is 1, 2, or 3; n* is 1, 2, 3, 4, 5, or 6 (or 1, 2, 3, or 4); n*−k*=d*; M* is boron; and Q* is independently selected from hydride, bridged or unbridged dialkylamido, halogen, alkoxide, aryloxide, hydrocarbyl radicals, said Q* having up to 20 carbon atoms with the proviso that in not more than 1 occurrence is Q* a halogen.

This invention also relates in an embodiment of the invention to a method to polymerize olefins comprising contacting olefins (such as ethylene and/or propylene) with a long-bridged (e.g., imino-phenylene-alkylene-imino bridged) salen catalyst compound as described above, optionally with a CTA and an NCA activator represented by the Formula (2):

R^(n)M**(ArNHal)_(4−n)  (2)

where R is a monoanionic ligand; M** is a Group 13 metal or metalloid; ArNHal is a halogenated, nitrogen-containing aromatic ring, polycyclic aromatic ring, or aromatic ring assembly in which two or more rings (or fused ring systems) are joined directly to one another or together; and n is 0, 1, 2, or 3. Typically the NCA comprising an anion of Formula 2 also comprises a suitable cation that is essentially non-interfering with the ionic catalyst complexes formed with the transition metal compounds, or the cation is Z_(d) ⁺ as described above.

In an embodiment according to the invention in any of the NCA's comprising an anion represented by Formula 2 described above, R is selected from the group consisting of C₁ to C₃₀ hydrocarbyl radicals. In an embodiment according to the invention, C₁ to C₃₀ hydrocarbyl radicals may be substituted with one or more C₁ to C₂₀ hydrocarbyl radicals, halide, hydrocarbyl substituted organometalloid, dialkylamido, alkoxy, aryloxy, alkysulfido, arylsulfido, alkylphosphido, arylphosphide, or other anionic substituent; fluoride; bulky alkoxides, where bulky means C₄ to C₂₀ hydrocarbyl radicals; —SR^(a), —NR^(a) ₂, and —PR^(a) ₂, where each R^(a) is independently a C₄ to C₂₀ hydrocarbyl as defined above; or a C₄ to C₂₀ hydrocarbyl substituted organometalloid.

In an embodiment according to the invention in any of the NCA's comprising an anion represented by Formula 2 described above, the NCA also comprises cation comprising a reducible Lewis acid represented by the formula: (Ar₃C⁺), where Ar is aryl or aryl substituted with a heteroatom, and/or a C₁ to C₄₀ hydrocarbyl, or the reducible Lewis acid represented by the formula: (Ph₃C⁺), where Ph is phenyl or phenyl substituted with one or more heteroatoms, and/or C₁ to C₄₀ hydrocarbyls.

In an embodiment according to the invention in any of the NCA's comprising an anion represented by Formula 2 described above, the NCA may also comprise a cation represented by the formula, (L-H)_(d) ⁺, wherein L is a neutral Lewis base; H is hydrogen; (L-H) is a Bronsted acid; and d is 1, 2, or 3, or (L-H)_(d) ⁺ is a Bronsted acid selected from ammoniums, oxoniums, phosphoniums, silyliums, and mixtures thereof.

Further examples of useful activators include those disclosed in U.S. Pat. Nos. 7,297,653 and 7,799,879, which are fully incorporated by reference herein.

In an embodiment according to the invention, an activator useful herein comprises a salt of a cationic oxidizing agent and a noncoordinating, compatible anion represented by the Formula (3):

(OX^(e+))_(d)(A^(d−))_(e)  (3)

wherein OX^(e+) is a cationic oxidizing agent having a charge of e+; e is 1, 2, or 3; d is 1, 2 or 3; and A^(d−) is a non-coordinating anion having the charge of d− (as further described above). Examples of cationic oxidizing agents include: ferrocenium, hydrocarbyl-substituted ferrocenium, Ag⁺, or Pb⁺². Suitable embodiments according to the invention of A^(d−) include tetrakis(pentafluorophenyl)borate.

In an embodiment according to the invention, the long-bridged (e.g., imino-phenylene-alkylene-imino bridged) salen catalyst compounds, optional CTA's, and/or NCA's described herein can be used with bulky activators. A “bulky activator” as used herein refers to anionic activators represented by the formula:

where: each R¹ is, independently, a halide, or a fluoride; each R² is, independently, a halide, a C₆ to C₂₀ substituted aromatic hydrocarbyl radical or a siloxy group of the formula O—Si—R^(a), where R^(a) is a C₁ to C₂₀ hydrocarbyl or hydrocarbylsilyl radical (or R² is a fluoride or a perfluorinated phenyl radical); each R³ is a halide, C₆ to C₂₀ substituted aromatic hydrocarbyl radical or a siloxy group of the formula —O—Si—R^(a), where R^(a) is a C₁ to C₂₀ hydrocarbyl radical or hydrocarbylsilyl group (or R³ is a fluoride or a C₆ perfluorinated aromatic hydrocarbyl radical); wherein R² and R³ can form one or more saturated or unsaturated, substituted or unsubstituted rings (or R² and R³ form a perfluorinated phenyl ring); L is a neutral Lewis base; (L-H)⁺ is a Bronsted acid; d is 1, 2, or 3; wherein the anion has a molecular weight of greater than 1020 g/mol; and wherein at least three of the substituents on the B atom each have a molecular volume of greater than 250 cubic Å, or greater than 300 cubic Å, or greater than 500 cubic Å.

As discussed above, “Molecular volume” is used herein as an approximation of spatial steric bulk of an activator molecule in solution. Exemplary bulky substituents of activators suitable herein and their respective scaled volumes and molecular volumes are shown in the table below. The dashed bonds indicate binding to boron, as in the general formula above.

Molecular Formula of MV Total Structure of boron each Per subst. MV Activator substituents substituent (Å³) (Å³) Dimethylanilinium tetrakis(perfluoronaphthyl)borate

C₁₀F₇ 261 1044 Dimethylanilinium tetrakis(perfluorobiphenyl)borate

C₁₂F₉ 349 1396 [4-tButyl-PhNMe₂H] [(C₆F₃(C₆F₅)₂)₄B]

C₁₈F₁₃ 515 2060

Exemplary bulky activators useful in catalyst systems herein include: trimethylammonium tetrakis(perfluoronaphthyl)borate, triethylammonium tetrakis(perfluoronaphthyl) borate, tripropylammonium tetrakis(perfluoronaphthyl)borate, tri(n-butyl)ammonium tetrakis(perfluoronaphthyl)borate, tri(tert-butyl)ammonium tetrakis(perfluoronaphthyl)borate, N,N-dimethylanilinium tetrakis(perfluoronaphthyl) borate, N,N-diethylanilinium tetrakis(perfluoronaphthyl)borate, N,N-dimethyl-(2,4,6-trimethylanilinium)tetrakis(perfluoronaphthyl)borate, tropillium tetrakis(perfluoronaphthyl)borate, triphenylcarbenium tetrakis(perfluoronaphthyl)borate, triphenylphosphonium tetrakis(perfluoronaphthyl)borate, triethylsilylium tetrakis(perfluoronaphthyl)borate, benzene(diazonium)tetrakis(perfluoronaphthyl)borate, trimethylammonium tetrakis(perfluorobiphenyl)borate, triethylammonium tetrakis(perfluorobiphenyl)borate, tripropylammonium tetrakis(perfluorobiphenyl)borate, tri(n-butyl)ammonium tetrakis(perfluorobiphenyl)borate, tri(tert-butyl)ammonium tetrakis(perfluorobiphenyl)borate, N,N-dimethylanilinium tetrakis(perfluorobiphenyl)borate, N,N-diethylanilinium tetrakis(perfluorobiphenyl)borate, N,N-dimethyl-(2,4,6-trimethylanilinium)tetrakis(perfluorobiphenyl)borate, tropillium tetrakis(perfluorobiphenyl)borate, triphenylcarbenium tetrakis(perfluorobiphenyl)borate, triphenylphosphonium tetrakis(perfluorobiphenyl)borate, triethylsilylium tetrakis(perfluorobiphenyl)borate, benzene (diazonium)tetrakis(perfluorobiphenyl)borate, [4-tert-butyl-PhNMe₂H][(C₆F₃(C₆F₅)₂)₄B], and the types disclosed in U.S. Pat. No. 7,297,653, which is fully incorporated by reference herein.

Illustrative, but not limiting, examples of boron compounds which may be used as an activator in the processes according to the instant disclosure include: trimethylammonium tetraphenylborate, triethylammonium tetraphenylborate, tripropylammonium tetraphenylborate, tri(n-butyl)ammonium tetraphenylborate, tri(tert-butyl)ammonium tetraphenylborate, N,N-dimethylanilinium tetraphenylborate, N,N-diethylanilinium tetraphenylborate, N,N-dimethyl-(2,4,6-trimethylanilinium)tetraphenylborate, tropillium tetraphenyl borate, triphenylcarbenium tetraphenylborate, triphenylphosphonium tetraphenyl borate, triethylsilylium tetraphenylborate, benzene(diazonium)tetraphenylborate, trimethylammonium tetrakis(pentafluorophenyl)borate, triethylammonium tetrakis(pentafluorophenyl)borate, tripropylammonium tetrakis(pentafluorophenyl)borate, tri(n-butyl)ammonium tetrakis(pentafluorophenyl)borate, tri(sec-butyl)ammonium tetrakis(pentafluorophenyl)borate, N,N-dimethylanilinium tetrakis(pentafluorophenyl)borate, N,N-diethylanilinium tetrakis(pentafluorophenyl)borate, N,N-dimethyl-(2,4,6-trimethylanilinium)tetrakis(pentafluorophenyl)borate, tropillium tetrakis(pentafluorophenyl)borate, triphenylcarbenium tetrakis(pentafluorophenyl)borate, triphenylphosphonium tetrakis(pentafluorophenyl)borate, triethylsilylium tetrakis(pentafluorophenyl)borate, benzene(diazonium)tetrakis(pentafluorophenyl)borate, trimethylammonium tetrakis-(2,3,4,6-tetrafluorophenyl)borate, triethyl ammonium tetrakis-(2,3,4,6-tetrafluorophenyl)borate, tripropylammonium tetrakis-(2,3,4,6-tetrafluorophenyl)borate, tri(n-butyl)ammonium tetrakis-(2,3,4,6-tetrafluoro-phenyl)borate, dimethyl(tert-butyl)ammonium tetrakis-(2,3,4,6-tetrafluorophenyl)borate, N,N-dimethylanilinium tetrakis-(2,3,4,6-tetrafluorophenyl)borate, N,N-diethyl anilinium tetrakis-(2,3,4,6-tetrafluorophenyl)borate, N,N-dimethyl-(2,4,6-trimethyl anilinium)tetrakis-(2,3,4,6-tetrafluorophenyl)borate, tropillium tetrakis-(2,3,4,6-tetrafluorophenyl)borate, triphenylcarbenium tetrakis-(2,3,4,6-tetrafluorophenyl)borate, triphenylphosphonium tetrakis-(2,3,4,6-tetrafluoro phenyl)borate, triethyl silylium tetrakis-(2,3,4,6-tetrafluorophenyl)borate, benzene(diazonium)tetrakis-(2,3,4,6-tetrafluorophenyl)borate, trimethylammonium tetrakis(perfluoro naphthyl)borate, triethylammonium tetrakis(perfluoronaphthyl)borate, tripropyl ammonium tetrakis(perfluoronaphthyl)borate, tri(n-butyl)ammonium tetrakis(perfluoronaphthyl)borate, tri(tert-butyl)ammonium tetrakis(perfluoronaphthyl)borate, N,N-dimethyl anilinium tetrakis(perfluoronaphthyl)borate, N,N-diethyl anilinium tetrakis(perfluoronaphthyl)borate, N,N-dimethyl-(2,4,6-trimethyl anilinium)tetrakis(perfluoronaphthyl)borate, tropilliumtetrakis(perfluoronaphthyl)borate, triphenylcarbenium tetrakis(perfluoronaphthyl)borate, triphenylphosphonium tetrakis(perfluoronaphthyl)borate, triethylsilylium tetrakis(perfluoronaphthyl)borate, benzene(diazonium)tetrakis(perfluoronaphthyl)borate, trimethylammonium tetrakis(perfluorobiphenyl)borate, triethylammoniumtetrakis(perfluorobiphenyl)borate, tripropylammonium tetrakis(perfluorobiphenyl)borate, tri(n-butyl)ammonium tetrakis(perfluorobiphenyl)borate, tri(tert-butyl)ammonium tetrakis(perfluorobiphenyl)borate, N,N-dimethylanilinium tetrakis(perfluorobiphenyl)borate, N,N-diethyl aniliniumtetrakis(perfluorobiphenyl)borate, N,N-dimethyl-(2,4,6-trimethylanilinium)tetrakis(perfluorobiphenyl)borate, tropillium tetrakis(perfluorobiphenyl)borate, triphenylcarbenium tetrakis(perfluorobiphenyl)borate, triphenylphosphonium tetrakis(perfluorobiphenyl)borate, triethylsilylium tetrakis(perfluorobiphenyl)borate, benzene(diazonium)tetrakis(perfluorobiphenyl)borate, trimethylammonium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate, triethylammoniumtetrakis(3,5-bis(trifluoro methyl)phenyl)borate, tripropylammoniumtetrakis(3,5-bis(trifluoromethyl)phenyl)borate, tri(n-butyl)ammonium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate, tri(tert-butyl)ammonium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate, N,N-dimethyl aniliniumtetrakis(3,5-bis(trifluoromethyl)phenyl)borate, N,N-diethylanilinium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate, N,N-dimethyl-(2,4,6-trimethylanilinium)tetrakis(3,5-bis(trifluoromethyl)phenyl)borate, tropillium tetrakis(3,5-bis(trifluoro methyl)phenyl)borate, triphenylcarbenium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate, triphenylphosphonium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate, triethylsilylium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate, benzene(diazonium)tetrakis(3,5-bis(trifluoromethyl)phenyl)borate, and dialkyl ammonium salts, such as: di-(i-propyl)ammonium tetrakis(pentafluorophenyl)borate, and dicyclohexyl ammonium tetrakis(pentafluorophenyl)borate; and additional tri-substituted phosphonium salts, such as tri(o-tolyl)phosphonium tetrakis(pentafluorophenyl)borate, and tri(2,6-dimethylphenyl)phosphonium tetrakis(pentafluorophenyl)borate.

Suitable activators include: N,N-dimethylanilinium tetrakis(perfluoronaphthyl)borate, N,N-dimethylanilinium tetrakis(perfluorobiphenyl)borate, N,N-dimethylanilinium tetrakis(3,5-bis(trifluoro methyl)phenyl)borate, triphenylcarbenium tetrakis(perfluoronaphthyl)borate, triphenylcarbenium tetrakis(perfluorobiphenyl)borate, triphenylcarbenium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate, triphenylcarbenium tetrakis(perfluorophenyl)borate, [Ph₃C⁺][B(C₆F₅)₄ ⁻], [Me₃NH⁺][B(C₆F₅)₄ ⁻]; 1-(4-(tris(pentafluorophenyl)borate)-2,3,5,6-tetrafluorophenyl)pyrrolidinium; tetrakis(pentafluorophenyl)borate; and 4-(tris(pentafluorophenyl)borate)-2,3,5,6-tetrafluoropyridine.

In an embodiment according to the invention, the activator comprises a triaryl carbonium (such as triphenylcarbenium tetraphenylborate, triphenylcarbenium tetrakis-(2,3,4,6-tetrafluoro phenyl)borate, triphenylcarbenium tetrakis(perfluoronaphthyl)borate, triphenyl carbenium tetrakis(perfluorobiphenyl)borate, triphenylcarbenium tetrakis(3,5-bis(trifluoromethyl)phenyl)borate).

In an embodiment according to the invention, the activator comprises one or more of: trialkylammonium tetrakis(pentafluorophenyl)borate, N,N-dialkylanilinium tetrakis(pentafluorophenyl)borate, N,N-dimethyl-(2,4,6-trimethylanilinium)tetrakis(pentafluorophenyl)borate, trialkylammonium tetrakis-(2,3,4,6-tetrafluoro phenyl)borate, N,N-dialkylanilinium tetrakis-(2,3,4,6-tetrafluorophenyl)borate, trialkylammonium tetrakis(perfluoronaphthyl)borate, N,N-dialkylanilinium tetrakis(perfluoronaphthyl)borate, trialkylammonium tetrakis(perfluorobiphenyl)borate, N,N-dialkylanilinium tetrakis(perfluorobiphenyl)borate, trialkylammoniumtetrakis(3,5-bis(trifluoromethyl)phenyl)borate, N,N-dialkyl aniliniumtetrakis(3,5-bis(trifluoromethyl)phenyl)borate, N,N-dialkyl-(2,4,6-trimethyl anilinium)tetrakis(3,5-bis(trifluoromethyl)phenyl)borate, di-(i-propyl)ammonium tetrakis(pentafluorophenyl)borate, where alkyl is methyl, ethyl, propyl, n-butyl, sec-butyl, or tert-butyl.

In an embodiment according to the invention, any of the activators described herein may be mixed together before or after combination with the catalyst compound and/or optional CTA and/or NCA, or before being mixed with the catalyst compound and/or optional CTA, and/or NCA.

In an embodiment according to the invention two NCA activators may be used in the polymerization and the molar ratio of the first NCA activator to the second NCA activator can be any ratio. In an embodiment according to the invention, the molar ratio of the first NCA activator to the second NCA activator is 0.01:1 to 10, 10,000:1, or 0.1:1 to 1000:1, or 1:1 to 100:1.

In an embodiment according to the invention, the NCA activator-to-catalyst ratio is a 1:1 molar ratio, or 0.1:1 to 100:1, or 0.5:1 to 200:1, or 1:1 to 500:1 or 1:1 to 1000:1. In an embodiment according to the invention, the NCA activator-to-catalyst ratio is 0.5:1 to 10:1, or 1:1 to 5:1.

In an embodiment according to the invention, the catalyst compounds can be combined with combinations of alumoxanes and NCA's (see for example, U.S. Pat. No. 5,153,157, U.S. Pat. No. 5,453,410, EP 0 573 120 B1, WO 9407928, and WO 95/14044 which discuss the use of an alumoxane in combination with an ionizing activator, all of which are incorporated by reference herein).

Useful chain transfer agents are typically alkylalumoxanes, a compound represented by the formula AlR³, ZnR² (where each R is, independently, a C₁-C₈ aliphatic radical, preferably methyl, ethyl, propyl butyl, pentyl, hexyl octyl or an isomer thereof) or a combination thereof, such as diethyl zinc, methylalumoxane, trimethylaluminum, triisobutylaluminum, trioctylaluminum, or a combination thereof.

Scavengers or Co-Activators

In an embodiment according to the invention the catalyst system may further include scavengers and/or co-activators. Suitable aluminum alkyl or organoaluminum compounds which may be utilized as scavengers or co-activators include, for example, trimethylaluminum, triethylaluminum, triisobutylaluminum, tri-n-hexylaluminum, tri-n-octylaluminum and the like. Other oxophilic species such as diethyl zinc may be used.

Catalyst Supports

In an embodiment according to the invention, the catalyst system may comprise an inert support material. In an embodiment according to the invention, the support material comprises a porous support material, for example, talc, and/or inorganic oxides. Other suitable support materials include zeolites, clays, organoclays, or any other organic or inorganic support material and the like, or mixtures thereof.

In an embodiment according to the invention, the support material is an inorganic oxide in a finely divided form. Suitable inorganic oxide materials for use in catalyst systems herein include Groups 2, 4, 13, and 14 metal oxides, such as silica, alumina, and mixtures thereof. Other inorganic oxides that may be employed either alone or in combination with the silica, and/or alumina include magnesia, titania, zirconia, montmorillonite, phyllosilicate, and/or the like. Other suitable support materials include finely divided functionalized polyolefins, such as finely divided polyethylene.

In an embodiment according to the invention, the support material may have a surface area in the range of from about 10 to about 700 m²/g, pore volume in the range of from about 0.1 to about 4.0 cc/g and average particle size in the range of from about 5 to about 500 μm, or the surface area of the support material is in the range of from about 50 to about 500 m²/g, pore volume of from about 0.5 to about 3.5 cc/g and average particle size of from about 10 to about 200 μm. In an embodiment according to the invention, a majority portion of the surface area of the support material is in the range is from about 100 to about 400 m²/g, pore volume from about 0.8 to about 3.0 cc/g and average particle size is from about 5 to about 100 μm. In an embodiment according to the invention, the average pore size of the support material is in the range of from 10 to 1000 Å, or 50 to about 500 Å, or 75 to about 350 Å. In an embodiment according to the invention, the support material is a high surface area, amorphous silica having a surface area greater than or equal to about 300 m²/g, and/or a pore volume of 1.65 cm³/g. Suitable silicas are marketed under the trade names of Davison 952 or Davison 955 by the Davison Chemical Division of W.R. Grace and Company. In an embodiment according to the invention the support may comprise Davison 948.

In an embodiment according to the invention, the support material should be essentially dry, that is, essentially free of absorbed water. Drying of the support material can be effected by heating or calcining at about 100° C. to about 1000° C., or at a temperature of at least about 400° C., or 500° C., or 600° C. When the support material is silica, it is heated to at least 200° C., or about 200° C. to about 850° C., or at least 600° C. for a time of about 1 minute to about 100 hours, or from about 12 hours to about 72 hours, or from about 24 hours to about 60 hours. In an embodiment according to the invention, the calcined support material must have at least some reactive hydroxyl (OH) groups to produce supported catalyst systems according to the instant disclosure.

In an embodiment according to the invention, the calcined support material is contacted with at least one polymerization catalyst comprising at least one catalyst compound and an activator. In an embodiment according to the invention, the support material, having reactive surface groups, typically hydroxyl groups, is slurried in a non-polar solvent and the resulting slurry is contacted with a solution of a catalyst compound and an activator. In an embodiment according to the invention, the slurry of the support material is first contacted with the activator for a period of time in the range of from about 0.5 hours to about 24 hours, or from about 2 hours to about 16 hours, or from about 4 hours to about 8 hours. The solution of the catalyst compound is then contacted with the isolated supportactivator. In an embodiment according to the invention, the supported catalyst system is generated in situ. In alternate embodiments according to the invention, the slurry of the support material is first contacted with the catalyst compound for a period of time in the range of from about 0.5 hours to about 24 hours, or from about 2 hours to about 16 hours, or from about 4 hours to about 8 hours. The slurry of the supported catalyst compound is then contacted with the activator solution.

In an embodiment according to the invention, the mixture of the catalyst, activator and support is heated to about 0° C. to about 70° C., or to about 23° C. to about 60° C., or to 25° C. (room temperature). Contact times typically range from about 0.5 hours to about 24 hours, or from about 2 hours to about 16 hours, or from about 4 hours to about 8 hours.

Suitable non-polar solvents are materials in which all of the reactants used herein, i.e., the activator and the catalyst compound are at least partially soluble and which are liquid at reaction temperatures. Suitable non-polar solvents include alkanes, such as isopentane, hexane, n-heptane, octane, nonane, and decane, although a variety of other materials including cycloalkanes, such as cyclohexane, aromatics, such as benzene, toluene, and ethylbenzene, may also be employed.

Polymerization Processes

In an embodiment according to the invention, a polymerization processes includes contacting monomers (such as ethylene and propylene), and optionally comonomers, with a catalyst system comprising an activator and at least one catalyst compound, as described above. In an embodiment according to the invention, the catalyst compound and activator may be combined in any order, and may be combined prior to contacting with the monomer. In an embodiment according to the invention, the catalyst compound and/or the activator are combined after contacting with the monomer.

In an embodiment according to the invention, the salen ligand may be combined with the metalation reagent to produce the metal substituted catalyst precursor prior to catalyst activation, with or without isolation of the catalyst precursor, or simultaneously with activation and/or in the presence of monomers such that the catalyst is formed in-situ during the polymerization process.

In an embodiment according to the invention, a process to polymerize olefins may comprise: contacting a salen ligand with a metalation reagent to produce a catalyst precursor; and contacting the catalyst precursor with an activator and one or more olefins at polymerization conditions to produce a polyolefin; wherein the salen ligand is represented by the formula:

wherein the metalation reagent is represented by the formula: MX¹X²X³X⁴

wherein the catalyst precursor is represented by the formula:

wherein each solid line represents a covalent bond and each dashed line represents a bond having varying degrees of covalency and a varying degree of coordination; wherein n is 1 or 2; wherein M is a Group 3, 4, 5 or 6 transition metal, provided however where n is 1 then X² is not present; wherein N¹ and N² are nitrogen and O¹ and O² are oxygen; wherein each of X¹ and X² (where present) is, independently, a univalent C₁ to C₂₀ hydrocarbyl radical, a functional group comprising elements from Groups 13-17 of the periodic table of the elements, or X¹ and X² if present may join together to form a C₄ to C₆₂ cyclic or polycyclic ring structure; wherein Y comprises an sp³ carbon directly bonded to N² and is selected from the group consisting of divalent C₁ to C₄₀ hydrocarbyl radicals, divalent functional groups comprising elements from Groups 13-17 of the periodic table of the elements, and combinations thereof; and wherein each of R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, R¹¹, and R¹² is, independently, a hydrogen, a C₁-C₄₀ hydrocarbyl radical, a functional group comprising elements from Group 13-17 of the periodic table of the elements, or two or more of R¹ to R¹² may independently join together to form a C₄ to C₆₂ cyclic or polycyclic ring structure.

In a particular embodiment according to the invention, a process to polymerize olefins may comprise: contacting a salen ligand with a metalation reagent to produce a catalyst precursor; and contacting the catalyst precursor with an activator and one or more olefins at polymerization conditions to produce a polyolefin; wherein the salen ligand is represented by the formula:

wherein the metalation reagent is represented by the formula: MX¹X²X³X⁴ wherein the catalyst precursor is represented by the formula:

wherein N¹ and N² are nitrogen and O¹ and O² are oxygen, and comprising [O¹,N¹,N²]—[N¹,N²,O²] in a fac-mer arrangement, a mer-fac arrangement or a fac-fac arrangement; or wherein activation rearranges [O¹,N¹,N²]—[N¹,N²,O²] into a fac-mer arrangement, a mer-fac arrangement or a fac-fac arrangement; wherein each solid line represents a covalent bond and each dashed line represents a bond having varying degrees of covalency and a varying degree of coordination; wherein M is a Group 4, 5 or 6 transition metal; wherein each of X¹ and X² is, independently, a univalent C₁ to C₂₀ hydrocarbyl radical, a functional group comprising elements from Groups 13-17 of the periodic table of the elements, or X¹ and X² join together to form a C₄ to C₆₂ cyclic or polycyclic ring structure; wherein Y comprises an sp³ carbon directly bonded to N² and is selected from the group consisting of divalent C₁ to C₄₀ hydrocarbyl radicals, divalent functional groups comprising elements from Groups 13-17 of the periodic table of the elements, and combinations thereof; and wherein each of R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, R¹¹, and R¹² is independently, a hydrogen, a C₁-C₄₀ hydrocarbyl radical, a functional group comprising elements from Group 13-17 of the periodic table of the elements, or two or more of R¹ to R¹² may independently join together to form a C₄ to C₆₂ cyclic or polycyclic ring structure.

In an embodiment according to the invention, the salen ligand and the metalation reagent may be contacted prior to combination with the activator and subsequently with the activator without isolation of the precursor catalyst compound. In an embodiment according to the invention, the salen ligand and the metalation reagent may be contacted in the presence of the activator, in the presence of one or more olefins, or a combination thereof, e.g., in an in-situ polymerization process.

Monomers useful herein include substituted or unsubstituted C₂ to C₄₀ alpha olefins, or C₂ to C₂₀ alpha olefins, or C₂ to C₁₂ alpha olefins, or ethylene, propylene, butene, pentene, hexene, heptene, octene, nonene, decene, undecene, dodecene and isomers thereof. In an embodiment according to the invention, the monomer comprises propylene and an optional comonomers comprising one or more ethylene or C₄ to C₄₀ olefins, or C₄ to C₂₀ olefins, or C₆ to C₁₂ olefins. The C₄ to C₄₀ olefin monomers may be linear, branched, or cyclic. The C₄ to C₄₀ cyclic olefins may be strained or unstrained, monocyclic or polycyclic, and may optionally include heteroatoms and/or one or more functional groups. In an embodiment according to the invention, the monomer comprises ethylene or ethylene and a comonomer comprising one or more C₃ to C₄₀ olefins, or C₄ to C₂₀ olefins, or C₆ to C₁₂ olefins. The C₃ to C₄₀ olefin monomers may be linear, branched, or cyclic. The C₃ to C₄₀ cyclic olefins may be strained or unstrained, monocyclic or polycyclic, and may optionally include heteroatoms and/or one or more functional groups.

Exemplary C₂ to C₄₀ olefin monomers and optional comonomers include ethylene, propylene, butene, pentene, hexene, heptene, octene, nonene, decene, undecene, dodecene, norbornene, norbornadiene, dicyclopentadiene, cyclopentene, cycloheptene, cyclooctene, cyclooctadiene, cyclo do decene, 7-ox anorbornene, 7-ox anorbornadiene, substituted derivatives thereof, and isomers thereof, or hexene, heptene, octene, nonene, decene, dodecene, cyclooctene, 1,5-cyclooctadiene, 1-hydroxy-4-cyclooctene, 1-acetoxy-4-cyclooctene, 5-methylcyclopentene, cyclopentene, dicyclopentadiene, norbornene, norbornadiene, and their respective homologs and derivatives, or norbornene, norbornadiene, and dicyclopentadiene.

In an embodiment according to the invention one or more dienes are present in the polymer produced herein at up to 10 weight %, or at 0.00001 to 1.0 weight %, or 0.002 to 0.5 weight %, or 0.003 to 0.2 weight %, based upon the total weight of the composition. In an embodiment according to the invention 500 ppm or less of diene is added to the polymerization, or 400 ppm or less, or 300 ppm or less. In an embodiment according to the invention at least 50 ppm of diene is added to the polymerization, or 100 ppm or more, or 150 ppm or more.

Diolefin monomers useful in this invention include any hydrocarbon structure, or C₄ to C₃₀, having at least two unsaturated bonds, wherein at least two of the unsaturated bonds are readily incorporated into a polymer by either a stereospecific or a non-stereospecific catalyst(s). In an embodiment according to the invention, the diolefin monomers may be selected from alpha, omega-diene monomers (i.e. di-vinyl monomers). More or, the diolefin monomers are linear di-vinyl monomers, most or those containing from 4 to 30 carbon atoms. Examples of dienes include butadiene, pentadiene, hexadiene, heptadiene, octadiene, nonadiene, decadiene, undecadiene, dodecadiene, tridecadiene, tetradecadiene, pentadecadiene, hexadecadiene, heptadecadiene, octadecadiene, nonadecadiene, icosadiene, heneicosadiene, docosadiene, tricosadiene, tetracosadiene, pentacosadiene, hexacosadiene, heptacosadiene, octacosadiene, nonacosadiene, triacontadiene, 1,6-heptadiene, 1,7-octadiene, 1,8-nonadiene, 1,9-decadiene, 1,10-undecadiene, 1,11-dodecadiene, 1,12-tridecadiene, 1,13-tetradecadiene, and low molecular weight polybutadienes (Mw less than 1000 g/mol). Cyclic dienes include cyclopentadiene, vinylnorbornene, norbornadiene, ethylidene norbornene, divinylbenzene, dicyclopentadiene or higher ring containing diolefins with or without substituents at various ring positions.

In an embodiment according to the invention, where butene is the comonomer, the butene source may be a mixed butene stream comprising various isomers of butene. The 1-butene monomers are expected to be preferentially consumed by the polymerization process. Use of such mixed butene streams will provide an economic benefit, as these mixed streams are often waste streams from refining processes, for example, C₄ raffinate streams, and can therefore be substantially less expensive than pure 1-butene.

Polymerization processes according to the instant disclosure may be carried out in any manner known in the art. Any suspension, homogeneous, bulk, solution, slurry, or gas phase polymerization process known in the art can be used. Such processes can be run in a batch, semi-batch, or continuous mode. Homogeneous polymerization processes and slurry processes are suitable for use herein, wherein a homogeneous polymerization process is defined to be a process where at least 90 wt % of the product is soluble in the reaction media. A bulk homogeneous process is suitable for use herein, wherein a bulk process is defined to be a process where monomer concentration in all feeds to the reactor is 70 volume % or more. In an embodiment according to the invention, no solvent or diluent is present or added in the reaction medium, (except for the small amounts used as the carrier for the catalyst system or other additives, or amounts typically found with the monomer; e.g., propane in propylene). In an embodiment according to the invention, the process is a slurry process. As used herein the term “slurry polymerization process” means a polymerization process where a supported catalyst is employed and monomers are polymerized on the supported catalyst particles. At least 95 wt % of polymer products derived from the supported catalyst are in granular form as solid particles (not dissolved in the diluent).

Suitable diluents/solvents for polymerization include non-coordinating, inert liquids. Examples include straight and branched-chain hydrocarbons, such as isobutane, butane, pentane, isopentane, hexanes, isohexane, heptane, octane, dodecane, and mixtures thereof; cyclic and alicyclic hydrocarbons, such as cyclohexane, cycloheptane, methylcyclohexane, methylcycloheptane, and mixtures thereof, such as can be found commercially (Isopar™); perhalogenated hydrocarbons, such as perfluorinated C₄₋₁₀ alkanes, chlorobenzene, and aromatic and alkyl substituted aromatic compounds, such as benzene, toluene, mesitylene, and xylene. Suitable solvents also include liquid olefins which may act as monomers or comonomers including ethylene, propylene, 1-butene, 1-hexene, 1-pentene, 3-methyl-1-pentene, 4-methyl-1-pentene, 1-octene, 1-decene, and mixtures thereof. In an embodiment according to the invention, aliphatic hydrocarbon solvents are used as the solvent, such as isobutane, butane, pentane, isopentane, hexanes, isohexane, heptane, octane, dodecane, and mixtures thereof; cyclic and alicyclic hydrocarbons, such as cyclohexane, cycloheptane, methylcyclohexane, methylcycloheptane, and mixtures thereof. In an embodiment according to the invention, the solvent is not aromatic, or aromatics are present in the solvent at less than 1 wt %, or less than 0.5 wt %, or less than 0.0 wt % based upon the weight of the solvents.

In an embodiment according to the invention, the feed concentration of the monomers and comonomers for the polymerization is 60 vol % solvent or less, or 40 vol % or less, or 20 vol % or less, based on the total volume of the feedstream. Or the polymerization is run in a bulk process.

Polymerizations can be run at any temperature and/or pressure suitable to obtain the desired ethylene polymers. Suitable temperatures and/or pressures include a temperature in the range of from about 0° C. to about 300° C., or about 20° C. to about 200° C., or about 35° C. to about 150° C., or from about 40° C. to about 120° C., or from about 45° C. to about 80° C.; and at a pressure in the range of from about 0.35 MPa to about 10 MPa, or from about 0.45 MPa to about 6 MPa, or from about 0.5 MPa to about 4 MPa. In an embodiment according to the invention, the run time of the reaction is from about 0.1 minutes to about 24 hours, or up to 16 hours, or in the range of from about 5 to 250 minutes, or from about 10 to 120 minutes.

In an embodiment according to the invention, hydrogen is present in the polymerization reactor at a partial pressure of 0.001 to 50 psig (0.007 to 345 kPa), or from 0.01 to 25 psig (0.07 to 172 kPa), or 0.1 to 10 psig (0.7 to 70 kPa).

In an embodiment according to the invention, the activity of the catalyst is at least 50 g/mmol/hr, or 500 or more g/mmol/hr, or 5000 or more g/mmol/hr, or 50,000 or more mmol/hr. In an alternate embodiment according to the invention, the conversion of olefin monomer is at least 10%, based upon polymer yield and the weight of the monomer entering the reaction zone, or 20% or more, or 30% or more, or 50% or more, or 80% or more.

In an embodiment according to the invention, the polymerization conditions include one or more of the following: 1) temperatures of 0 to 300° C. (or 25 to 150° C., or 40 to 120° C., or 45 to 80° C.); 2) a pressure of atmospheric pressure to 10 MPa (or 0.35 to 10 MPa, or from 0.45 to 6 MPa, or from 0.5 to 4 MPa); 3) the presence of an aliphatic hydrocarbon solvent (such as isobutane, butane, pentane, isopentane, hexanes, isohexane, heptane, octane, dodecane, and mixtures thereof; cyclic and alicyclic hydrocarbons, such as cyclohexane, cycloheptane, methylcyclohexane, methylcycloheptane, and mixtures thereof; or where aromatics are or present in the solvent at less than 1 wt %, or less than 0.5 wt %, or at 0 wt % based upon the weight of the solvents); 4) wherein the catalyst system used in the polymerization comprises less than 0.5 mol %, or 0 mol % alumoxane, or the alumoxane is present at a molar ratio of aluminum to transition metal less than 500:1, or less than 300:1, or less than 100:1, or less than 1:1; 5) the polymerization or occurs in one reaction zone; 6) the productivity of the catalyst compound is at least 80,000 g/mmol/hr (or at least 150,000 g/mmol/hr, or at least 200,000 g/mmol/hr, or at least 250,000 g/mmol/hr, or at least 300,000 g/mmol/hr); 7) scavengers (such as trialkyl aluminum compounds) are absent (e.g., present at zero mol %) or the scavenger is present at a molar ratio of scavenger to transition metal of less than 100:1, or less than 50:1, or less than 15:1, or less than 10:1; and/or 8) optionally hydrogen is present in the polymerization reactor at a partial pressure of 0.007 to 345 kPa (0.001 to 50 psig) (or from 0.07 to 172 kPa (0.01 to 25 psig), or 0.7 to 70 kPa (0.1 to 10 psig)).

In an embodiment according to the invention, the catalyst system used in the polymerization comprises no more than one catalyst compound. A “reaction zone” also referred to as a “polymerization zone” is a vessel where polymerization takes place, for example a batch reactor. When multiple reactors are used in either series or parallel configuration, each reactor is considered as a separate polymerization zone. For a multi-stage polymerization in both a batch reactor and a continuous reactor, each polymerization stage is considered as a separate polymerization zone. In an embodiment according to the invention, the polymerization occurs in one reaction zone.

In an embodiment according to the invention, a process to polymerize olefins comprises contacting one or more olefins with a catalyst system according to any one or combination of embodiments according to the invention disclosed herein at polymerization conditions to produce a polyolefin.

In a particular embodiment according to the invention, the polymerization conditions comprise a temperature of from about 0° C. to about 300° C., a pressure from about 0.35 MPa to about 10 MPa, and a time from about 0.1 minutes to about 24 hours. In an embodiment according to the invention, the one or more olefins comprise propylene. In an embodiment according to the invention, the polyolefin comprises at least 50 mole % propylene.

In an embodiment according to the invention, a process to polymerize olefins comprises contacting one or more olefins with a catalyst system at polymerization conditions to produce a polyolefin, the catalyst system comprising an activator and a catalyst compound represented by the formula:

wherein M is a Group 3, 4, 5 or 6 transition metal; wherein N¹ and N² are nitrogen and O¹ and O² are oxygen; wherein n is 1 or 2; wherein each X is, independently, a univalent C₁ to C₂₀ hydrocarbyl radical, a functional group comprising elements from Groups 13-17 of the periodic table of the elements, or where n is 2 then each X may join together to form a C₄ to C₆₂ cyclic or polycyclic ring structure; wherein Y comprises an sp³ carbon directly bonded to N² and is selected from the group consisting of divalent C₁ to C₄₀ hydrocarbyl radicals, divalent functional groups comprising elements from Groups 13-17 of the periodic table of the elements, and combinations thereof; and wherein each of R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, R¹¹, and R¹² is, independently, a hydrogen, a C₁-C₄₀ hydrocarbyl radical, a functional group comprising elements from Group 13-17 of the periodic table of the elements, or two or more of R¹ to R¹² may independently join together to form a C₄ to C₆₂ cyclic or polycyclic ring structure.

In a particular embodiment according to the invention, a process to polymerize olefins comprises contacting one or more olefins with a catalyst system at polymerization conditions to produce a polyolefin, the catalyst system comprising an activator and a catalyst compound represented by the formula:

wherein N¹ and N² are nitrogen and O¹ and O² are oxygen and comprising [O¹,N¹,N²]—[N¹,N²,O²] in a fac-mer arrangement or a mer-fac arrangement or a fac-fac arrangement, or wherein activation rearranges [O¹,N¹,N²]—[N¹,N²,O²] into a fac-mer arrangement or a mer-fac arrangement or a fac-fac arrangement; wherein each solid line represents a covalent bond and each dashed line represents a bond having varying degrees of covalency and a varying degree of coordination; wherein M is a Group 3, 4, 5 or 6 transition metal; wherein each of X¹ and X² is, independently, a univalent C₁ to C₂₀ hydrocarbyl radical, a functional group comprising elements from Groups 13-17 of the periodic table of the elements, or X¹ and X² join together to form a C₄ to C₆₂ cyclic or polycyclic ring structure; wherein Y comprises an sp³ carbon directly bonded to N² and is selected from the group consisting of divalent C₁ to C₄₀ hydrocarbyl radicals, divalent functional groups comprising elements from Groups 13-17 of the periodic table of the elements, and combinations thereof; and wherein each of R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, R¹¹, and R¹² is independently, a hydrogen, a C₁-C₄₀ hydrocarbyl radical, a functional group comprising elements from Group 13-17 of the periodic table of the elements, or two or more of R¹ to R¹² may independently join together to form a C₄ to C₆₂ cyclic or polycyclic ring structure.

In an embodiment according to the invention, the polymerization conditions comprise a temperature of from about 0° C. to about 300° C., a pressure from about 0.35 MPa to about 10 MPa, and a time from about 0.1 minutes to about 24 hours.

In an embodiment according to the invention, two or more different catalyst compounds are present in the catalyst system used herein. In an embodiment according to the invention, two or more different catalyst compounds are present in the reaction zone where the process(es) described herein occur. When two transition metal compound based catalysts are used in one reactor as a mixed catalyst system, the two transition metal compounds are chosen such that the two are preferably compatible. Compatible catalysts are those catalysts having similar kinetics of termination and insertion of monomer and comonomer(s) and/or do not detrimentally interact with each other. For purposes herein, the term “incompatible catalysts” refers to and means catalysts that satisfy one or more of the following: 1) those catalysts that when present together reduce the activity of at least one of the catalysts by greater than 50%; 2) those catalysts that under the same reactive conditions produce polymers such that one of the polymers has a molecular weight that is more than twice the molecular weight of the other polymer; and 3) those catalysts that differ in comonomer incorporation or reactivity ratio under the same conditions by more than about 30%. A simple screening method such as by ¹H or ¹³C NMR, known to those of ordinary skill in the art, can be used to determine which transition metal compounds are compatible. In an embodiment according to the invention, the catalyst systems use the same activator for the catalyst compounds. In an embodiment according to the invention, two or more different activators, such as a non-coordinating anion activator and an alumoxane, can be used in combination. If one or more catalyst compounds contain an X¹ or X² ligand which is not a hydride, or a hydrocarbyl, then in an embodiment according to the invention the alumoxane is contacted with the catalyst compounds prior to addition of the non-coordinating anion activator.

In an embodiment according to the invention, when two transition metal compounds (pre-catalysts) are utilized, they may be used in any ratio. In an embodiment according to the invention, a molar ratio of a first transition metal compound (A) to a second transition metal compound (B) will fall within the range of (A:B) 1:1000 to 1000:1, or 1:100 to 500:1, or 1:10 to 200:1, or 1:1 to 100:1, or 1:1 to 75:1, or 5:1 to 50:1. The particular ratio chosen will depend on the exact pre-catalysts chosen, the method of activation, and the end product desired. In an embodiment according to the invention, when using two pre-catalysts, where both are activated with the same activator, useful mole percents, based upon the total moles of the pre-catalysts, are 10:90 to 0.1:99, or 25:75 to 99:1, or 50:50 to 99.5:0.5, or 50:50 to 99:1, or 75:25 to 99:1, or 90:10 to 99:1.

Polyolefin Products

The instant disclosure also relates to compositions of matter produced by the methods described herein.

In an embodiment according to the invention, the process described herein produces propylene homopolymers or propylene copolymers, such as propylene-ethylene and/or propylene-α-olefin (or C₃ to C₂₀) copolymers (such as propylene-hexene copolymers or propylene-octene copolymers) having an Mw/Mn of greater than 1 to 4 (or greater than 1 to 3).

Likewise, the process of this invention produces olefin polymers, or polyethylene and polypropylene homopolymers and copolymers. In an embodiment according to the invention, the polymers produced herein are homopolymers of ethylene or propylene, are copolymers of ethylene or having from 0 to 25 mole % (or from 0.5 to 20 mole %, or from 1 to 15 mole %, or from 3 to 10 mole %) of one or more C₃ to C₂₀ olefin comonomer (or C₃ to C₁₂ alpha-olefin, or propylene, butene, hexene, octene, decene, dodecene, or propylene, butene, hexene, octene), or are copolymers of propylene or having from 0 to 25 mole % (or from 0.5 to 20 mole %, or from 1 to 15 mole %, or from 3 to 10 mole %) of one or more of C₂ or C₄ to C₂₀ olefin comonomer (or ethylene or C₄ to C₁₂ alpha-olefin, or ethylene, butene, hexene, octene, decene, dodecene, or ethylene, butene, hexene, octene).

In an embodiment according to the invention, the polymers produced herein have an Mw of 5,000 to 1,000,000 g/mol (e.g., 25,000 to 750,000 g/mol, or 50,000 to 500,000 g/mol), and/or an Mw/Mn of greater than 1 to 40, or 1.2 to 20, or 1.3 to 10, or 1.4 to 5, or 1.5 to 4, or 1.5 to 3.

In an embodiment according to the invention, the polymer produced herein has a unimodal or multimodal molecular weight distribution as determined by Gel Permeation Chromatography (GPC). By “unimodal” is meant that the GPC trace has one peak or inflection point. By “multimodal” is meant that the GPC trace has at least two peaks or inflection points. An inflection point is that point where the second derivative of the curve changes in sign (e.g., from negative to positive or vice versa).

Unless otherwise indicated Mw, Mn, MWD are determined by GPC as described in US 20060173123 page 24-25, paragraphs [0334] to [0341]. In an embodiment according to the invention, one or more olefins comprise propylene.

In a particular embodiment, the polyolefin comprises at least 50 mole % propylene, preferably at least 75 mol % propylene, preferably at least 85 mol % propylene. In an embodiment according to the invention, the polyolefin has a concentration of meso isotactic pentads [mmmm] of greater than or equal to about 50 wt %, or 60 wt %, or 70 wt %, or 80 wt %, or 90 wt %, or greater than or equal to about 99 wt %, based on the total weight of the polymer. In a particular embodiment, the polyolefin comprises at least 50 mole % propylene having a concentration of meso isotactic pentads [mmmm] of greater than or equal to about 90 wt %, based on the total weight of the polymer. In an embodiment according to the invention, the polyolefin has a concentration of meso isotactic pentads [mmmm] of greater than or equal to about 50 wt %, or 60 wt %, or 70 wt %, or 80 wt %, or 90 wt %, or greater than or equal to about 99 wt %, based on the total weight of the polymer as determined by ¹³C NMR. The polypropylene polymer preferably has some level of isotacticity and is preferably isotactic polypropylene or highly isotactic polypropylene. As used herein, “isotactic” is defined as having at least 10% isotactic pentads according to analysis by ¹³C NMR. As used herein, “highly isotactic” is defined as having at least 60% isotactic pentads according to analysis by ¹³C NMR.

The polypropylene polymer can have a propylene meso diads content of 90% or more, 92% or more, 94% or more, 95% or more, 96% or more, 97% or more, or 98% or more. The isotacticity of the polypropylene polymer can be measured by ¹³C NMR. For example, suitable techniques for measuring the isotacticity of the polypropylene polymer can be as discussed and described in U.S. Pat. No. 4,950,720. Expressed another way, the isotacticity of the polypropylene polymer, as measured by ¹³C NMR, and expressed as pentad content, is greater than 93% or 95%, or 97% in certain embodiments.

The polymer produced herein can have a heat of fusion (H_(f), DSC second heat) from a high of 50 J/g or more, preferably 60 J/g or more, preferably 70 J/g or more, preferably 80 J/g or more, preferably 90 J/g or more, preferably about 95 J/g or more, or preferably about 100 J/g or more.

In an embodiment according to the invention, the polyolefin comprises at least 50 mole % propylene, e.g., isotactic polypropylene, and has a melting point (T_(meit) or Tm) determined using differential scanning calorimetry, greater than 154° C., e.g., from about 145° C. to about 175° C., or from about 145° C. to about 170° C. Within this range, in an embodiment according to the invention, the polyolefin has a melting point T_(meit) of greater than or equal to about 148° C., or greater than or equal to about 150° C., or greater than or equal to about 152° C., or greater than or equal to about 154° C., or greater than or equal to about 155° C., or greater than or equal to about 156° C., or greater than or equal to about 157° C., or greater than or equal to about 158° C., or greater than or equal to about 159° C., or greater than or equal to about 160° C., or greater than or equal to about 161° C., or greater than or equal to about 162° C., or greater than or equal to about 163° C., or greater than or equal to about 164° C., or greater than or equal to about 165° C. In embodiments, the polyolefin has a melting point T_(melt) of less than or equal to about 175° C., or less than or equal to about 170° C., or less than or equal to about 167° C. In embodiments, the polyolefin comprises greater than 95 wt % isotactic polypropylene, or greater than 96 wt % isotactic polypropylene, or greater than 97 wt % isotactic polypropylene, or greater than 98 wt % isotactic polypropylene, up to 99.9 wt % isotactic polypropylene, by weight of the polyolefin. In particular embodiments, the polyolefin comprises greater than 95 wt % isotactic polypropylene and has a melting point greater than or equal to about 160° C., or wherein the polyolefin comprises greater than 98 wt % isotactic polypropylene and has a melting point greater than or equal to about 165° C.

Blends

In an embodiment according to the invention, the polymer (or the polyethylene or polypropylene) produced herein is combined with one or more additional polymers prior to being formed into a film, molded part or other article. Other useful polymers include polyethylene, isotactic polypropylene, highly isotactic polypropylene, syndiotactic polypropylene, random copolymer of propylene and ethylene, and/or butene, and/or hexene, polybutene, ethylene vinyl acetate, LDPE, LLDPE, HDPE, ethylene vinyl acetate, ethylene methyl acrylate, copolymers of acrylic acid, polymethylmethacrylate or any other polymers polymerizable by a high-pressure free radical process, polyvinylchloride, polybutene-1, isotactic polybutene, ABS resins, ethylene-propylene rubber (EPR), vulcanized EPR, EPDM, block copolymer, styrenic block copolymers, polyamides, polycarbonates, PET resins, cross linked polyethylene, copolymers of ethylene and vinyl alcohol (EVOH), polymers of aromatic monomers such as polystyrene, polyesters, polyacetal, polyvinylidine fluoride, polyethylene glycols, and/or polyisobutylene.

In an embodiment according to the invention, the polymer (or the polyethylene or polypropylene) is present in the above blends, at from 10 to 99 wt %, based upon the weight of the polymers in the blend, or 20 to 95 wt %, or at least 30 to 90 wt %, or at least 40 to 90 wt %, or at least 50 to 90 wt %, or at least 60 to 90 wt %, or at least 70 to 90 wt %.

The blends described above may be produced by mixing the polymers according to the invention with one or more polymers (as described above), by connecting reactors together in series to make reactor blends or by using more than one catalyst in the same reactor to produce multiple species of polymer. The polymers can be mixed together prior to being put into the extruder or may be mixed in an extruder.

The blends may be formed using conventional equipment and methods, such as by dry blending the individual components and subsequently melt mixing in a mixer, or by mixing the components together directly in a mixer, such as, for example, a Banbury mixer, a Haake mixer, a Brabender internal mixer, or a single or twin-screw extruder, which may include a compounding extruder and a side-arm extruder used directly downstream of a polymerization process, which may include blending powders or pellets of the resins at the hopper of the film extruder. Additionally, additives may be included in the blend, in one or more components of the blend, and/or in a product formed from the blend, such as a film, as desired. Such additives are well known in the art, and can include, for example: fillers; antioxidants (e.g., hindered phenolics such as IRGANOX 1010 or IRGANOX 1076 available from Ciba-Geigy); phosphites (e.g., IRGAFOS 168 available from Ciba-Geigy); anti-cling additives; tackifiers, such as polybutenes, terpene resins, aliphatic and aromatic hydrocarbon resins, alkali metal and glycerol stearates, and hydrogenated rosins; UV stabilizers; heat stabilizers; anti-blocking agents; release agents; anti-static agents; pigments; colorants; dyes; waxes; silica; fillers; talc; and the like.

Films

In an embodiment according to the invention, any of the foregoing polymers, such as the foregoing polypropylenes or blends thereof, may be used in a variety of end-use applications. Applications include, for example, mono- or multi-layer blown, extruded, and/or shrink films. These films may be formed by any number of well-known extrusion or coextrusion techniques, such as a blown bubble film processing technique, wherein the composition can be extruded in a molten state through an annular die and then expanded to form a uni-axial or biaxial orientation melt prior to being cooled to form a tubular, blown film, which can then be axially slit and unfolded to form a flat film. Films may be subsequently unoriented, uniaxially oriented, or biaxially oriented to the same or different extents. One or more of the layers of the film may be oriented in the transverse and/or longitudinal directions to the same or different extents. The uniaxial orientation can be accomplished using typical cold drawing or hot drawing methods. Biaxial orientation can be accomplished using tenter frame equipment or a double bubble processes and may occur before or after the individual layers are brought together. For example, a polyethylene layer can be extrusion coated or laminated onto an oriented polypropylene layer or the polyethylene and polypropylene can be coextruded together into a film then oriented. Likewise, oriented polypropylene could be laminated to oriented polyethylene or oriented polyethylene could be coated onto polypropylene then optionally the combination could be oriented even further. Typically the films are oriented in the machine direction (MD) at a ratio of up to 15, or between 5 and 7, and in the transverse direction (TD) at a ratio of up to 15, or 7 to 9. However, in an embodiment according to the invention the film is oriented to the same extent in both the MD and TD directions.

The films may vary in thickness depending on the intended application; however, films of a thickness from 1 to 50 μm are usually suitable. Films intended for packaging are usually from 10 to 50 μm thick. The thickness of the sealing layer is typically 0.2 to 50 μm. There may be a sealing layer on both the inner and outer surfaces of the film or the sealing layer may be present on only the inner or the outer surface.

In an embodiment according to the invention, one or more layers may be modified by corona treatment, electron beam irradiation, gamma irradiation, flame treatment, or microwave. In an embodiment according to the invention, one or both of the surface layers is modified by corona treatment.

Molded Products

The compositions described herein (particularly polypropylene compositions) may also be used to prepare molded products in any molding process, including but not limited to, injection molding, gas-assisted injection molding, extrusion blow molding, injection blow molding, injection stretch blow molding, compression molding, rotational molding, foam molding, thermoforming, sheet extrusion, and profile extrusion. The molding processes are well known to those of ordinary skill in the art.

Further, the compositions described herein (particularly polypropylene compositions) may be shaped into desirable end use articles by any suitable means known in the art. Thermoforming, vacuum forming, blow molding, rotational molding, slush molding, transfer molding, wet lay-up or contact molding, cast molding, cold forming matched-die molding, injection molding, spray techniques, profile co-extrusion, or combinations thereof are typically used methods.

Thermoforming is a process of forming at least one pliable plastic sheet into a desired shape. Typically, an extrudate film of the composition of this invention (and any other layers or materials) is placed on a shuttle rack to hold it during heating. The shuttle rack indexes into the oven which pre-heats the film before forming. Once the film is heated, the shuttle rack indexes back to the forming tool. The film is then vacuumed onto the forming tool to hold it in place and the forming tool is closed. The tool stays closed to cool the film and the tool is then opened. The shaped laminate is then removed from the tool. The thermoforming is accomplished by vacuum, positive air pressure, plug-assisted vacuum forming, or combinations and variations of these, once the sheet of material reaches thermoforming temperatures, typically of from 140° C. to 185° C. or higher. A pre-stretched bubble step is used, especially on large parts, to improve material distribution.

Blow molding is another suitable forming means for use with the compositions of this invention, which includes injection blow molding, multi-layer blow molding, extrusion blow molding, and stretch blow molding, and is especially suitable for substantially closed or hollow objects, such as, for example, gas tanks and other fluid containers. Blow molding is described in more detail in, for example, CONCISE ENCYCLOPEDIA OF POLYMER SCIENCE AND ENGINEERING 90-92 (Jacqueline I. Kroschwitz, ed., John Wiley & Sons 1990).

Likewise, molded articles may be fabricated by injecting molten polymer into a mold that shapes and solidifies the molten polymer into desirable geometry and thickness of molded articles. Sheets may be made either by extruding a substantially flat profile from a die, onto a chill roll, or by calendaring. Sheets are generally considered to have a thickness of from 254 μm to 2540 μm (10 mils to 100 mils), although any given sheet may be substantially thicker.

Non-Wovens and Fibers

The polyolefin compositions described above may also be used to prepare nonwoven fabrics and fibers of this invention in any nonwoven fabric and fiber making process, including but not limited to, melt blowing, spunbonding, film aperturing, and staple fiber carding. A continuous filament process may also be used. Or a spunbonding process is used. The spunbonding process is well known in the art. Generally it involves the extrusion of fibers through a spinneret. These fibers are then drawn using high velocity air and laid on an endless belt. A calendar roll is generally then used to heat the web and bond the fibers to one another although other techniques may be used such as sonic bonding and adhesive bonding.

EMBODIMENTS

Accordingly, the instant disclosure relates to the following embodiments:

E1

-   -   A catalyst compound represented by the formula:

-   -   wherein M is a Group 3, 4, 5 or 6 transition metal; wherein N¹         and N² are nitrogen and O¹ and O² are oxygen; wherein n is 1 or         2; wherein each X is, independently, a univalent C₁ to C₂₀         hydrocarbyl radical, a functional group comprising elements from         Groups 13-17 of the periodic table of the elements, or where n         is 2 then each X may join together to form a C₄ to C₆₂ cyclic or         polycyclic ring structure; wherein Y comprises an sp³ carbon         directly bonded to N² and is selected from the group consisting         of divalent C₁ to C₄₀ hydrocarbyl radicals, divalent functional         groups comprising elements from Groups 13-17 of the periodic         table of the elements, and combinations thereof and wherein each         of R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, R¹¹, and R¹² is,         independently, a hydrogen, a C₁-C₄₀ hydrocarbyl radical, a         functional group comprising elements from Group 13-17 of the         periodic table of the elements, or two or more of R¹ to R¹² may         independently join together to form a C₄ to C₆₂ cyclic or         polycyclic ring structure.

E2

-   -   The catalyst compound according to Embodiment E1, wherein the         compound is represented by the formula:

-   wherein each of R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, R¹³, R¹⁴,     R¹⁵, and R¹⁶ is independently, a hydrogen, a C₁-C₄₀ hydrocarbyl     radical, a functional group comprising elements from Group 13-17 of     the periodic table of the elements, or two or more of R¹ to R¹⁰ and     R¹³ to R¹⁶ may independently join together to form a C₄ to C₆₂     cyclic or polycyclic ring structure.

E3

-   -   The catalyst compound according to Embodiment E1, wherein the         compound is represented by the formula:

-   wherein each of R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, R¹³, R¹⁴,     R¹⁵, R¹⁶, R¹⁷, and R¹⁸ is, independently, a hydrogen, a C₁-C₄₀     hydrocarbyl radical, a functional group comprising elements from     Group 13-17 of the periodic table of the elements, or two or more of     R¹ to R¹⁰ and R¹³ to R¹⁸ may independently join together to form a     C₄ to C₆₂ cyclic or polycyclic ring structure.

E4

-   -   A catalyst compound represented by the formula:

-   wherein each solid line represents a covalent bond and each dashed     line represents a bond having varying degrees of covalency and a     varying degree of coordination; wherein M is a Group 4, 5 or 6     transition metal; wherein N¹ and N² are nitrogen and O¹ and O² are     oxygen; wherein each of X¹ and X² is, independently, a univalent C₁     to C₂₀ hydrocarbyl radical, a functional group comprising elements     from Groups 13-17 of the periodic table of the elements, or X¹ and     X² join together to form a C₄ to C₆₂ cyclic or polycyclic ring     structure; wherein Y comprises an sp³ carbon directly bonded to N²     and is selected from the group consisting of divalent C₁ to C₄₀     hydrocarbyl radicals, divalent functional groups comprising elements     from Groups 13-17 of the periodic table of the elements, and     combinations thereof; wherein each of R¹, R², R³, R⁴, R⁵, R⁶, R⁷,     R⁸, R⁹, R¹⁰, R¹¹ and R¹² is independently, a hydrogen, a C₁-C₄₀     hydrocarbyl radical, a functional group comprising elements from     Group 13-17 of the periodic table of the elements, or two or more of     R¹ to R¹² may independently join together to form a C₄ to C₆₂ cyclic     or polycyclic ring structure.

E5

-   -   The catalyst compound according to any one of Embodiments E1 to         E4, wherein [O¹,N¹,N²]—[N¹,N²,O²] are in a fac-mer arrangement.

E6

-   -   The catalyst compound according to any one of Embodiments E1 to         E4, wherein [O¹,N¹,N²]—[N¹,N²,O²] are in a mer-fac arrangement.

E7

-   -   The catalyst compound according to any one of Embodiments E1 to         E4, wherein [O¹,N¹,N²]—[N¹,N²,O²] are in a fac-fac arrangement.

E8

-   -   The catalyst compound according to any one of Embodiments E1 to         E7, wherein M is Ti, Hf or Zr.

E9

-   -   The catalyst compound according to any one of Embodiments E1 to         E8, wherein M is Hf.

E10

-   -   The catalyst compound according to any one of Embodiments E1 to         E9, wherein each X (including each of X¹ and X²) is a benzyl         radical, a halogen radical, an O-i-propyl radical or an         O-tert-butyl radical.

E11

-   -   The catalyst compound according to any one of Embodiments E1 to         E10, wherein each X (including each of X¹ and X²) is a benzyl         radical.

E12

-   -   The catalyst compound according to any one of Embodiments E1 to         E11, wherein each of R¹ to R¹⁸ (if present) is, independently,         hydrogen, a halogen, or a C₁ to C₃₀ hydrocarbyl radical.

E13

-   -   The catalyst compound according to any one of Embodiments E1 to         E11, wherein each of R¹ to R¹⁸ (if present) is, independently,         hydrogen, a halogen, or a C₁ to C₁₀ hydrocarbyl radical.

E14

-   -   The catalyst compound according to any one of Embodiments E1 to         E13, wherein the sp3 carbon directly bonded to N² is a benzylic         carbon.

E15

-   -   The catalyst compound according to any one of Embodiments E1 to         E14, wherein Y (if present) is a divalent aliphatic radical         having from 1 to 10 carbon atoms.

E16

-   -   The catalyst compound according to any one of Embodiments E1 to         E15, wherein R¹¹ and R¹² (if present) join to form a phenylene         ring directly bonded to N² and Y, wherein the catalyst compound         is represented by the formula:

-   wherein each of R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, R¹³, R¹⁴,     R¹⁵, and R¹⁶ is independently, a hydrogen, a C₁-C₄₀ hydrocarbyl     radical, a functional group comprising elements from Group 13-17 of     the periodic table of the elements, or two or more of R¹ to R¹⁰ and     R¹³ to R¹⁶ may independently join together to form a C₄ to C₆₂     cyclic or polycyclic ring structure.

E17

-   -   The catalyst compound according to any one of Embodiments E1 to         E16, represented by the formula:

-   wherein each of R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, R¹³, R¹⁴,     R¹⁵, R¹⁶, R¹⁷, and R¹⁸ is independently, a hydrogen, a C₁-C₄₀     hydrocarbyl radical, a functional group comprising elements from     Group 13-17 of the periodic table of the elements, or two or more of     R¹ to R¹⁰ and R¹³ to R¹⁸ may independently join together to form a     C₄ to C₆₂ cyclic or polycyclic ring structure; and/or     -   wherein R¹⁴ and R¹⁵ join to form a 2,3-naphthalenylene ring         directly bonded to N² and Y to form an         imino-naphthalenylene-alkylene-imino bridged salen compound,         represented by the formula:

-   wherein each of R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, R¹³, R¹⁶,     R¹⁹, R²⁰, R²¹, and R²² is, independently, a hydrogen, a C₁-C₄₀     hydrocarbyl radical, a functional group comprising elements from     Group 13-17 of the periodic table of the elements, or two or more of     R¹ to R¹⁰ and R¹³ to R¹⁶ may independently join together to form a     C₄ to C₆₂ cyclic or polycyclic ring structure, and/or wherein the     naphthalenylene ring further comprises at least one additional     conjugated phenylene ring. E18. The catalyst compound according to     any one of Embodiments E1 to E17, wherein: each X including X¹ and     X² if present are benzyl radicals; at least one of R¹, R², R⁴, R⁵,     R⁷, and R⁸ are independently selected from the group consisting of:     C₁-C₁₀ alkyl, C₁-C₁₀ cycloalkyl, C₁-C₁₀ alkenyl C₁-C₁₀ alkoxy, aryl     substituted C₁-C₁₀ alkyl, C₁-C₁₀ aryl, halo, and combinations     thereof; and R³, R⁶, R⁹, R¹⁰, R¹³, R¹⁴, R¹⁵, R¹⁶, R¹⁷ and R¹⁸ (if     present) are hydrogen.

E19

-   -   The catalyst compound according to any one of Embodiments E1 to         E18, wherein at least one of R¹, R², R⁴, R⁵, R⁷, and R⁸ are         independently selected from the group consisting of: methyl,         ethyl, isopropyl, isobutyl, tertiary-butyl, isopentyl,         2-methyl-2-phenylethyl; methoxy, benzyl, adamantyl, chloro,         bromo, iodo, and combinations thereof.

E20

-   -   The catalyst compound according to any one of Embodiments E1 to         E19, wherein R² and R⁴ are identical, R⁵ and R⁷ are identical,         or a combination thereof.

E21

-   -   A catalyst system comprising an activator and a catalyst         compound according to any one of Embodiments E1 to E20.

E22

-   -   A catalyst system comprising an activator and a catalyst         compound represented by the formula:

-   wherein each solid line represents a covalent bond and each dashed     line represents a bond having varying degrees of covalency and a     varying degree of coordination; wherein M is a Group 3, 4, 5 or 6     transition metal; wherein N¹ and N² are nitrogen and O¹ and O² are     oxygen; wherein each of X¹ and X² is, independently, a univalent C₁     to C₂₀ hydrocarbyl radical, a functional group comprising elements     from Groups 13-17 of the periodic table of the elements, or X¹ and     X² join together to form a C₄ to C₆₂ cyclic or polycyclic ring     structure, provided however where M is trivalent X² is not present;     wherein Y comprises an sp³ carbon directly bonded to N² and is     selected from the group consisting of divalent C₁ to C₄₀ hydrocarbyl     radicals, divalent functional groups comprising elements from Groups     13-17 of the periodic table of the elements, and combinations     thereof; wherein each of R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰,     R¹¹, and R¹² is, independently, a hydrogen, a C₁-C₄₀ hydrocarbyl     radical, a functional group comprising elements from Group 13-17 of     the periodic table of the elements, or two or more of R¹ to R¹² may     independently join together to form a C₄ to C₆₂ cyclic or polycyclic     ring structure.

E23

-   -   The catalyst system according to Embodiment E21 or Embodiment         E22 wherein [O¹,N¹,N²]—[N¹,N²,O²] are in a fac-mer arrangement.

E24

-   -   The catalyst system according to Embodiment E21 or Embodiment         E22 wherein [O¹,N¹,N²]—[N¹,N²,O²] are in a mer-fac arrangement.

E25

-   -   The catalyst system according to Embodiment E21 or Embodiment         E22 wherein [O¹,N¹,N²]—[N¹,N²,O²] are in a fac-fac arrangement.

E26

-   -   The catalyst system according to Embodiment E21 or Embodiment         E22 wherein activation rearranges [O¹,N¹,N²]—[N¹,N²,O²] into a         fac-mer arrangement.

E27

-   -   The catalyst system according to Embodiment E21 or Embodiment         E22 wherein activation rearranges [O¹,N¹,N²]—[N¹,N²,O²] into a         mer-fac arrangement.

E28

-   -   The catalyst system according to Embodiment E21 or Embodiment         E22 wherein activation rearranges [O¹,N¹,N²]—[N¹,N²,O²] into a         fac-fac arrangement.

E29

-   -   The catalyst system according to any one of Embodiments E21 to         E28, wherein the activator comprises alumoxane, a         non-coordinating anion activator, or a combination thereof

E30

-   -   The catalyst system according to any one of Embodiments E21 to         E29, wherein the activator comprises alumoxane and the alumoxane         is present at a ratio of 1 mole aluminum or more per mole of         catalyst compound.

E31

-   -   The catalyst system according to any one of Embodiments E21 to         E30, wherein the activator is represented by the formula:

(Z)_(d) ⁺(A^(d−))

-   wherein Z is (L-H), or a reducible Lewis Acid, wherein L is a     neutral Lewis base, H is hydrogen and (L-H)⁺ is a Bronsted acid;     wherein A^(d−) is a non-coordinating anion having the charge d⁻; and     d is an integer from 1 to 3.

E32

-   -   The catalyst system according to any one of Embodiments E21 to         E31, wherein the activator is represented by the formula:

(Z)_(d) ⁺(A^(d−))

-   wherein A^(d−) is a non-coordinating anion having the charge d⁻;     wherein d is an integer from 1 to 3, and wherein Z is a reducible     Lewis acid represented by the formula: (Ar₃C⁺), where Ar is aryl     radical, an aryl radical substituted with a heteroatom, an aryl     radical substituted with one or more C₁ to C₄₀ hydrocarbyl radicals,     an aryl radical substituted with one or more functional groups     comprising elements from Groups 13-17 of the periodic table of the     elements, or a combination thereof.

E33

-   -   A process to activate a catalyst system, comprising combining an         activator with a catalyst compound according to any one of         Embodiments E1 to E20.

E34

-   -   A process to activate a catalyst system comprising combining an         activator with a catalyst compound represented by the formula:

-   wherein each solid line represents a covalent bond and each dashed     line represents a bond having varying degrees of covalency and a     varying degree of coordination; wherein M is a Group 3, 4, 5 or 6     transition metal; wherein N¹ and N² are nitrogen and O¹ and O² are     oxygen; wherein each of X¹ and X² is, independently, a univalent C₁     to C₂₀ hydrocarbyl radical, a functional group comprising elements     from Groups 13-17 of the periodic table of the elements, or X¹ and     X² join together to form a C₄ to C₆₂ cyclic or polycyclic ring     structure; wherein Y comprises an sp³ carbon directly bonded to N²     and is selected from the group consisting of divalent C₁ to C₄₀     hydrocarbyl radicals, divalent functional groups comprising elements     from Groups 13-17 of the periodic table of the elements, and     combinations thereof; and wherein each of R¹, R², R³, R⁴, R⁵, R⁶,     R⁷, R⁸, R⁹, R¹⁰, R¹¹, and R¹² is independently, a hydrogen, a C₁-C₄₀     hydrocarbyl radical, a functional group comprising elements from     Group 13-17 of the periodic table of the elements, or two or more of     R¹ to R¹² may independently join together to form a C₄ to C₆₂ cyclic     or polycyclic ring structure.

E35

-   -   The process according to Embodiment E33 or Embodiment E34         wherein [O¹,N¹,N²]—[N¹,N²,O²] are in a fac-mer arrangement.

E36

-   -   The process according to Embodiment E33 or Embodiment E34         wherein [O¹,N¹,N²]—[N¹,N²,O²] are in a mer-fac arrangement.

E37

-   -   The process according to Embodiment E33 or Embodiment E34         wherein [O¹,N¹,N²]—[N¹,N²,O²] are in a fac-fac arrangement.

E38

-   -   The process according to any one of Embodiments E33 to E37         wherein activation rearranges [O¹,N¹,N²]—[N¹,N²,O²] into a         fac-mer arrangement.

E39

-   -   The process according to any one of Embodiments E33 to E37         wherein activation rearranges [O¹,N¹,N²]—[N¹,N²,O²] into a         mer-fac arrangement.

E40

-   -   The process according to any one of Embodiments E33 to E37         wherein activation rearranges [O¹,N¹,N²]—[N¹,N²,O²] into a         fac-fac arrangement.

E41

-   -   The process according to any one of Embodiments E33 to E40         wherein a salen ligand and a metalation reagent are contacted to         form the catalyst compound prior to combination with the         activator and subsequently with the activator without isolation         of the catalyst compound.

E42

-   -   The process according to any one of Embodiments E33 to E40,         wherein a salen ligand and a metalation reagent are contacted to         form the catalyst compound in the presence of the activator, in         the presence of one or more olefins, or a combination thereof.

E43

-   -   A process to polymerize olefins comprising contacting one or         more olefins with a catalyst system according to any one of         Embodiments E21 to E32 at polymerization conditions to produce a         polyolefin.

E44

-   -   A process to polymerize olefins comprising: contacting one or         more olefins with a catalyst system at polymerization conditions         to produce a polyolefin, the catalyst system comprising an         activator and a catalyst compound represented by the formula:

-   wherein each solid line represents a covalent bond and each dashed     line represents a bond having varying degrees of covalency and a     varying degree of coordination; wherein M is a Group 3, 4, 5 or 6     transition metal; wherein N¹ and N² are nitrogen and O¹ and O² are     oxygen; wherein each of X¹ and X² is, independently, a univalent C₁     to C₂₀ hydrocarbyl radical, a functional group comprising elements     from Groups 13-17 of the periodic table of the elements, or X¹ and     X² join together to form a C₄ to C₆₂ cyclic or polycyclic ring     structure, provided however if M is trivalent X² is not present;     wherein Y comprises an sp³ carbon directly bonded to N² and is     selected from the group consisting of divalent C₁ to C₄₀ hydrocarbyl     radicals, divalent functional groups comprising elements from Groups     13-17 of the periodic table of the elements, and combinations     thereof; and wherein each of R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹,     R¹⁰, R¹¹, and R¹² is, independently, a hydrogen, a C₁-C₄₀     hydrocarbyl radical, a functional group comprising elements from     Group 13-17 of the periodic table of the elements, or two or more of     R¹ to R¹² may independently join together to form a C₄ to C₆₂ cyclic     or polycyclic ring structure.

E45

-   -   The process according to Embodiment E43 or Embodiment E44         wherein [O¹,N¹,N²]—[N¹,N²,O²] are in a fac-mer arrangement.

E46

-   -   The process according to Embodiment E43 or Embodiment E44         wherein [O¹,N¹,N²]—[N¹,N²,O²] are in a mer-fac arrangement.

E47

-   -   The process according to Embodiment E43 or Embodiment E44         wherein [O¹,N¹,N²]—[N¹,N²,O²] are in a fac-fac arrangement.

E48

-   -   The process according to any one of Embodiments E43 to E47         wherein activation rearranges [O¹,N¹,N²]—[N¹,N²,O²] into a         fac-mer arrangement.

E49

-   -   The process according to any one of Embodiments E43 to E47         wherein activation rearranges [O¹,N¹,N²]—[N¹,N²,O²] into a         mer-fac arrangement.

E50

-   -   The process according to any one of Embodiments E43 to E47         wherein activation rearranges [O¹,N¹,N²]—[N¹,N²O²] into a         fac-fac arrangement.

—.

E51

-   -   A process to polymerize olefins comprising: contacting a salen         ligand with a metalation reagent to produce a catalyst         precursor; and contacting the catalyst precursor with an         activator and one or more olefins at polymerization conditions         to produce a polyolefin; wherein the salen ligand is represented         by the formula:

-   -   wherein the metalation reagent is represented by the formula:         MX¹X²X³X⁴     -   wherein the catalyst precursor is represented by the formula:

-   wherein each solid line represents a covalent bond and each dashed     line represents a bond having varying degrees of covalency and a     varying degree of coordination; wherein n is 1 or 2; wherein M is a     Group 3, 4, 5 or 6 transition metal, provided however where n is 1     then X² is not present; wherein N¹ and N² are nitrogen and O¹ and O²     are oxygen; wherein each of X¹ and X² (where present) is,     independently, a univalent C₁ to C₂₀ hydrocarbyl radical, a     functional group comprising elements from Groups 13-17 of the     periodic table of the elements, or X¹ and X² if present may join     together to form a C₄ to C₆₂ cyclic or polycyclic ring structure;     wherein Y comprises an sp³ carbon directly bonded to N² and is     selected from the group consisting of divalent C₁ to C₄₀ hydrocarbyl     radicals, divalent functional groups comprising elements from Groups     13-17 of the periodic table of the elements, and combinations     thereof; and wherein each of R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹,     R¹⁰, R¹¹, and R¹² is independently, a hydrogen, a C₁-C₄₀ hydrocarbyl     radical, a functional group comprising elements from Group 13-17 of     the periodic table of the elements, or two or more of R¹ to R¹² may     independently join together to form a C₄ to C₆₂ cyclic or polycyclic     ring structure.

E52

-   -   A process to polymerize olefins comprising: contacting a salen         ligand with a metalation reagent to produce a catalyst         precursor; and contacting the catalyst precursor with an         activator and one or more olefins at polymerization conditions         to produce a polyolefin; wherein the salen ligand is represented         by the formula:

-   -   wherein the metalation reagent is represented by the formula:         MX¹X²X³X⁴     -   wherein the catalyst precursor is represented by the formula:

-   wherein each solid line in the formulae represents a covalent bond     and each dashed line represents a bond having varying degrees of     covalency and a varying degree of coordination; wherein each of R¹,     R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, R¹¹, and R¹² is independently,     a hydrogen, a C₁-C₄₀ hydrocarbyl radical, a functional group     comprising elements from Group 13-17 of the periodic table of the     elements, or two or more of R¹ to R¹² may independently join     together to form a C₄ to C₆₂ cyclic or polycyclic ring structure.

E53

-   -   The process according to any one of Embodiments E44 to E52,         wherein the polymerization conditions comprise a temperature of         from about 0° C. to about 300° C., a pressure from about 0.35         MPa to about 10 MPa, and a time from about 0.1 minutes to about         24 hours.

E54

-   -   The process according to any one of Embodiments E44 to E53         wherein [O¹,N¹,N²]—[N¹,N²,O²] are in a fac-mer arrangement.

E55

-   -   The process according to any one of Embodiments E44 to E53         wherein [O¹,N¹,N²]—[N¹,N²,O²] are in a mer-fac arrangement.

E56

-   -   The process according to any one of Embodiments E44 to E53         wherein [O¹,N¹,N²]—[N¹,N²,O²] are in a fac-fac arrangement.

E57

-   -   The process according to any one of Embodiments E44 to E56         wherein activation rearranges [O¹,N¹,N²]—[N¹,N²,O²] into a         fac-mer arrangement.

E58

-   -   The process according to any one of Embodiments E44 to E56         wherein activation rearranges [O¹,N¹,N²]—[N¹,N²,O²] into a         mer-fac arrangement.

E59

-   -   The process according to any one of Embodiments E44 to E56         wherein activation rearranges [O¹,N¹,N²]—[N¹,N²,O²] into a         fac-fac arrangement.

E60

-   -   The process according to any one of Embodiments E44 to E59,         wherein the salen ligand and the metalation reagent are         contacted prior to combination with the activator and         subsequently with the activator without isolation of the         catalyst compound.

E61

-   -   The process according to any one of Embodiments E44 to E60,         wherein the salen ligand and the metalation reagent are         contacted in the presence of the activator, in the presence of         one or more olefins, or a combination thereof

E62

-   -   The process according to any one of Embodiments E44 to E61,         wherein the one or more olefins comprise propylene.

E63

-   -   The process according to any one of Embodiments E44 to E62,         wherein the one or more olefins comprise at least 50 mole %         propylene.

E64

-   -   The process according to any one of Embodiments E44 to E63,         wherein the polyolefin comprises at least 50 mole % propylene         having a concentration of meso isotactic pentads [mmmm] of         greater than or equal to about 90 wt %, based on the total         weight of the polymer.

E65

-   -   The process according to any one of Embodiments E44 to E64,         wherein the polyolefin comprises greater than 95 wt % isotactic         polypropylene and has a melting point greater than or equal to         about 160° C.

E66

-   -   Polypropylene produced according to the process of any one of         Embodiments E44 to E65.

E67

-   -   The polypropylene according to Embodiment E66 having a melting         point determined using differential scanning calorimetry greater         than or equal to about 145° C.

E68

-   -   The polypropylene according to Embodiment E66 having a melting         point determined using differential scanning calorimetry greater         than or equal to about 148° C.

E69

-   -   The polypropylene according to Embodiment E66 having a melting         point determined using differential scanning calorimetry greater         than or equal to about 150° C.

E70

-   -   The polypropylene according to Embodiment E66 having a melting         point determined using differential scanning calorimetry greater         than or equal to about 152° C.

E71

-   -   The polypropylene according to Embodiment E66 having a melting         point determined using differential scanning calorimetry greater         than or equal to about 154° C.

E72

-   -   The polypropylene according to Embodiment E66 having a melting         point determined using differential scanning calorimetry greater         than or equal to about 155° C.

E73

-   -   The polypropylene according to Embodiment E66 having a melting         point determined using differential scanning calorimetry greater         than or equal to about 156° C.

E74

-   -   The polypropylene according to Embodiment E66 having a melting         point determined using differential scanning calorimetry greater         than or equal to about 157° C.

E75

-   -   The polypropylene according to Embodiment E66 having a melting         point determined using differential scanning calorimetry greater         than or equal to about 158° C.

E76

-   -   The polypropylene according to Embodiment E66 having a melting         point determined using differential scanning calorimetry greater         than or equal to about 159° C.

E77

-   -   The polypropylene according to Embodiment E66 having a melting         point determined using differential scanning calorimetry greater         than or equal to about 160° C.

E78

-   -   The polypropylene according to Embodiment E66 having a melting         point determined using differential scanning calorimetry greater         than or equal to about 161° C.

E79

-   -   The polypropylene according to Embodiment E66 having a melting         point determined using differential scanning calorimetry greater         than or equal to about 162° C.

E80

-   -   The polypropylene according to Embodiment E66 having a melting         point determined using differential scanning calorimetry greater         than or equal to about 163° C.

E81

-   -   The polypropylene according to Embodiment E66 having a melting         point determined using differential scanning calorimetry greater         than or equal to about 164° C.

E82

-   -   The polypropylene according to Embodiment E66 having a melting         point determined using differential scanning calorimetry greater         than or equal to about 165° C.

E83

-   -   The polypropylene according to any one of Embodiments E66 to E82         having a melting point determined using differential scanning         calorimetry less than or equal to about 175° C.

E84

-   -   The polypropylene according to any one of Embodiments E66 to E82         having a melting point determined using differential scanning         calorimetry less than or equal to about 170° C.

E85

-   -   The polypropylene according to any one of Embodiments E66 to E82         having a melting point determined using differential scanning         calorimetry less than or equal to about 167° C.

E86

-   -   The polypropylene according to any one of Embodiments E66 to E82         comprising greater than 95 wt % isotactic polypropylene.

E87

-   -   The polypropylene according to any one of Embodiments E66 to E82         comprising greater than 96 wt % isotactic polypropylene.

E88

-   -   The polypropylene according to any one of Embodiments E66 to E82         comprising greater than 97 wt % isotactic polypropylene.

E89

-   -   The polypropylene according to any one of Embodiments E66 to E82         comprising greater than 98 wt % isotactic polypropylene.

EXAMPLES

The foregoing discussion can be further described with reference to the following non-limiting examples. 28 illustrative catalyst compounds each according to one or more embodiments according to the invention described, were synthesized, wherein M is Ti, Zr or Hf, as shown in Table 1. Several catalysts were employed as polymerization catalyst. All polymerization reactions were carried out at room temperature (25° C.) using 10 micromoles of the catalyst and 500 eq. MAO as an activator under a purified nitrogen atmosphere using standard glovebox, high vacuum or Schlenk techniques, unless otherwise noted. All solvents used were anhydrous, de-oxygenated and purified according to known procedures. All starting materials were either purchased from Aldrich and purified prior to use or prepared according to procedures known to those skilled in the art.

TABLE 1

Example 1

Example 2

Example 3

Example 4

Example 5

Example 6

Example 7

Example 8

Example 9

Example 10

Example 11

Example 12

Example 13

Example 14

Example 15

Example 16

Example 17

Example 18

Example 19

Example 20

Example 21

Example 22

Example 23

Example 24

Example 25

Example 26

Example 27

Example 28

Example 1 Synthesis of the Ligand Precursor (Lig¹H₂)

A solution of 2-aminobenzylamine (0.45 gram, 3.69 mmol) in methanol (20 mL) was added to a solution of 3,5-dichlorosalicylaldehyde (1.40 gram, 7.38 mmol) in methanol (20 mL) and the reaction mixture was stirred at room temperature until an orange solid precipitated. The solid was collected by filtration, washed with cold methanol and dried yielding the ligand precursor quantitatively.

¹H NMR (CDCl₃, 400 MHz): δ=8.33 (s, 1H, NCH), 8.16 (s, 1H, NCH), 7.64 (d, 1H, J=2.5 Hz, ArH), 7.57 (d, 1H, J=2.5 Hz, ArH), 7.53-6.91 (m, 6H, ArH), 4.85 (s, 2H, CH₂).

Synthesis of Lig¹ HfBn₂

Lig¹H₂ (87 mg, 0.18 mmol) was dissolved in about 1 mL of toluene and added dropwise to a stirring yellow solution of HfBn₄ (101 mg, 0.18 mmol) in about 1 mL of toluene. The color of the solution changed to dark orange. The reaction mixture was stirred at room temperature for 2 hours the solvent was removed under vacuum. The remaining solid was washed with 1 mL of pentane and dried, yielding an orange solid quantitatively.

¹H NMR (C₆D₆, 400 MHz): δ=7.36 (s, 1H, NCH), δ=7.29 (s, 1H, NCH), 7.20 (d, 1H, J=1.8 Hz, ArH), 7.19-6.89 (m, 18H, ArH), 6.53 (d, 1H, J=1.8 Hz, ArH), 6.37 (d, J=1.8 Hz, 1H), 5.13 (d, J=9.7 Hz, 1H, CH), 4.98 (d, J=9.7 Hz, 1H, CH), 4.25 (d, J=12.0 Hz, 1H, CH), 3.62 (d, J=11.2 Hz, 1H, CH), 3.19 (d, J=11.2 Hz, 1H, CH), 3.08 (d, J=12.0 Hz, 1H, CH).

Example 2 Synthesis of the Ligand Precursor (Lig²H₂)

A solution of 2-aminobenzylamine (0.49 gram, 4.00 mmol) in methanol (20 mL) was added to a solution of 5-chlorosalicylaldehyde (1.27 gram, 8.00 mmol) in methanol (20 mL) and the reaction mixture was stirred at room temperature until an orange solid precipitated. The solid was collected by filtration, washed with cold methanol and dried yielding the ligand precursor quantitatively.

¹H NMR (CDCl₃, 200 MHz): δ=8.37 (s, 1H, NCH), 8.24 (s, 1H, NCH), 7.32-6.71 (m, 10H, ArH), 4.81 (s, 2H, CH₂).

Example 3 Synthesis of the Ligand Precursor (Lig³H₂)

A solution of 2-aminobenzylamine (0.29 gram, 2.38 mmol) in methanol (20 mL) was added to a solution of 3,5-dibromosalicylaldehyde (1.33 gram, 4.76 mmol) in methanol (20 mL) and the reaction mixture was stirred at room temperature until an orange solid precipitated. The solid was collected by filtration, washed with cold methanol and dried yielding the ligand precursor quantitatively.

¹H NMR (CDCl₃, 200 MHz): δ=8.30 (s, 1H, NCH), 8.24 (s, 1H, NCH), 7.59 (d, 1H, J=2.5 Hz, ArH), 7.48 (d, 1H, J=2.5 Hz, ArH), 7.53-6.91 (m, 6H, ArH), 4.78 (s, 2H, CH₂).

Example 4 Synthesis of the Ligand Precursor (Lig⁴H₂)

Lig⁴H₂ was prepared in quantitative yield according to the procedure of Example 1, using 2-aminobenzylamine (0.28 gram, 2.29 mmol) and 3,5-diiodosalicylaldehyde (1.71 gram, 4.58 mmol).

Synthesis of Lig⁴Ti(OiPr)₂

Lig⁴H₂ (143 mg, 0.17 mmol) was dissolved in 1 mL of toluene and added dropwise to a stirring solution of Ti(OiPr)₄ (49 mg, 0.17 mmol) in 1 mL of toluene. The reaction mixture was stirred at room temperature and after 2 hours the solvent was removed under vacuum, and the solid was washed with 1 mL of pentane and dried, yielding a yellow solid quantitatively.

¹H NMR (C₆D₆, 400 MHz): δ=8.13 (d, 1H, J=2.2 Hz, ArH), 8.11 (d, 1H, J=2.2 Hz, ArH), 7.22 (s, 1H, NCH), 7.18 (d, 1H, J=2.2 Hz, ArH), 7.01 (s, 1H, NCH), 7.98 (d, 1H, J=2.2 Hz, ArH), 6.96-6.72 (m, 4H, ArH), 4.76 (sept, J=6.1 Hz, 1H, CH), 4.21 (d, J=14.0 Hz, 1H, CH), 3.78 (sept, J=6.1 Hz, 1H, CH), 3.43 (d, J=14.0 Hz, 1H, CH), 1.19 (d, J=6.1 Hz, 3H, CH₃), 1.03 (d, J=6.1 Hz, 3H, CH₃), 0.64 (d, J=6.1 Hz, 3H, CH₃), 0.45 (d, J=6.1 Hz, 3H, CH₃).

Example 5 Synthesis of the Ligand Precursor (Lig⁵H₂)

Lig⁵H₂ was prepared in quantitative yield according to the procedure of Example 1, using 2-aminobenzylamine (0.32 gram, 2.61 mmol) and 3-methylsalicylaldehyde (0.71 gram, 5.22 mmol).

¹H NMR (CDCl₃, 200 MHz): δ=8.45 (s, 1H, NCH), 8.35 (s, 1H, NCH), 7.33-6.60 (m, 10H, ArH), 4.84 (s, 2H, CH₂), 2.20 (s, 3H, CH₃), 2.13 (s, 3H, CH₃).

Example 6 Synthesis of the Ligand Precursor (Lig⁶H₂)

Lig⁶H₂ was prepared in quantitative yield according to the procedure of Example 1, using 2-aminobenzylamine (0.30 gram, 2.43 mmol) and 5-methylsalicylaldehyde (0.66 gram, 4.86 mmol).

Example 7 Synthesis of the Ligand Precursor (Lig⁷H₂)

A solution of 2-aminobenzylamine (0.57 gram, 4.67 mmol) in methanol (20 mL) was added to a solution of salicylaldehyde (1.15 gram, 9.34 mmol) in methanol (20 mL) and the reaction mixture was stirred at room temperature for 2 hours. The solvent was removed under vacuum yielding the ligand precursor quantitatively as orange oil.

Example 8 Synthesis of the Ligand Precursor (Lig⁸H₂)

Lig⁸H₂ was prepared in quantitative yield according to the procedure of Example 1, using 2-aminobenzylamine (0.28 gram, 2.30 mmol) and 3-methoxy-5-bromosalicylaldehyde (1.06 gram, 4.60 mmol).

¹H NMR (CDCl₃, 200 MHz): δ=8.35 (s, 1H, NCH), 8.21 (s, 1H, NCH), 7.31-7.20 (m, 3H, ArH), 7.03-6.94 (m, 3H, ArH), 6.83-6.78 (m, 2H, ArH), 4.84 (s, 2H, CH₂), 3.82 (s, 3H, OCH₃), 3.73 (s, 3H, OCH₃).

Example 9 Synthesis of the Ligand Precursor (Lig⁹H₂)

Lig⁹H₂ was prepared in quantitative yield according to the procedure of Example 1, using 2-aminobenzylamine (0.41 gram, 3.39 mmol) and 3-isopropyl-5-chloro-6-methylsalicylaldehyde (1.44 gram, 6.78 mmol).

¹H NMR (CDCl₃, 400 MHz): δ=14.7 (s, 1H, OH), 14.4 (s, 1H, OH), 8.92 (s, 1H, NCH), 8.88 (s, 1H, NCH), 7.45-7.13 (m, 6H, ArH), 4.96 (s, 2H, CH₂), 3.40 (sept, 1H, J=7.5 Hz, CH), 3.22 (sept, 1H, J=7.5 Hz, CH), 2.51 (s, 3H, CH₃), 2.38 (s, 3H, CH₃), 1.25 (d, 6H, J=7.5 Hz, CH₃), 1.17 (d, 6H, J=7.5 Hz, CH₃).

Example 10 Synthesis of the Ligand Precursor (Lig¹⁹H₂)

Lig¹⁰H₂ was prepared in quantitative yield according to the procedure of Example 1, using 2-aminobenzylamine (2.44 gram, 0.02 mol) and 3,5-di-tert-butylsalicylaldehyde (9.36 gram, 0.04 mol).

¹H NMR (CDCl₃, 400 MHz): δ=8.58 (s, 1H, NCH), 8.52 (s, 1H, NCH), 7.47 (d, 1H, J=2.3 Hz, ArH), 7.45 (m, 1H, ArH), 7.36 (m, 1H, ArH), 7.33 (d, 1H, J=2.3 Hz, ArH), 7.28 (m, 1H, ArH), 7.22 (d, 1H, J=2.3 Hz, ArH), 7.13 (m, 1H, ArH), 7.00 (d, 1H, J=2.3 Hz, ArH), 4.93 (s, 2H, CH₂), 1.49 (s, 9H, CH₃), 1.40 (s, 9H, CH₃), 1.32 (s, 9H, CH₃), 1.25 (s, 9H, CH₃).

Synthesis of Lig¹⁰ZrBn₂

Lig¹⁰H₂ (35 mg, 0.06 mmol) was dissolved in 1 mL of toluene and added dropwise to a stirring solution of ZrBn₄ (29 mg, 0.06 mmol) in 1 mL of toluene. The color of the solution changed to dark orange. The reaction mixture was stirred at room temperature and after 2 hours the solvent was removed under vacuum, and the solid was washed with 1 mL of pentane and dried, yielding an orange solid quantitatively.

Synthesis of Lig¹⁰HfBn₂

Lig¹⁰H₂ (48 mg, 0.09 mmol) was dissolved in 1 mL of toluene and added dropwise to a stirring solution of HfBn₄ (47 mg, 0.09 mmol) in 1 mL of toluene. The color of the solution changed to dark orange. The reaction mixture was stirred at room temperature and after 2 hours the solvent was removed under vacuum, and the solid was washed with 1 mL of pentane and dried, yielding an orange solid quantitatively.

¹H NMR (C₆D₆, 400 MHz): δ=8.11 (s, 1H, NCH), 7.78 (d, 1H, J=1.7 Hz, ArH), 7.70 (s, 1H, NCH), 7.65 (d, 1H, J=1.7 Hz, ArH), 7.09-6.43 (m, 16H, ArH), 4.23 (d, J=13.4 Hz, 1H, CH), 3.48 (d, J=13.4 Hz, 1H, CH), 2.77 (d, J=8.3 Hz, 1H, CH), 2.70 (d, J=8.3 Hz, 1H, CH), 1.79 (d, J=9.1 Hz, 1H, CH), 1.64 (s, 9H, CH₃), 1.58 (s, 9H, CH₃), 1.61 (s, 18H, CH₃), 0.62 (d, J=9.1 Hz, 1H, CH).

Synthesis of Lig¹⁰Ti(OiPr)₂

Lig¹⁰H₂ (51 mg, 0.09 mmol) was dissolved in 1 mL of toluene and added dropwise to a stirring solution of Ti(OiPr)₄ (26 mg, 0.09 mmol) in 1 mL of toluene. The reaction mixture was stirred at room temperature and after 2 hours the solvent was removed under vacuum, and the solid was washed with 1 mL of pentane and dried, yielding a yellow solid quantitatively.

¹H NMR (C₆D₆, 200 MHz): δ=7.81 (s, 1H, NCH), 7.76 (d, 1H, J=1.3 Hz, ArH), 7.71 (d, 1H, J=1.3 Hz, ArH), 7.69 (s, 1H, NCH), 7.10-7.04 (m, 4H, ArH), 6.95-6.88 (m, 2H, ArH), 4.92 (sept, J=6.0 Hz, 1H, CH), 4.59 (d, J=12.2 Hz, 1H, CH), 3.61 (sept, J=6.0 Hz, 1H, CH), 3.47 (d, J=12.2 Hz, 1H, CH), 1.76 (s, 9H, CH₃), 1.68 (s, 9H, CH₃), 1.32 (s, 9H, CH₃), 1.29 (s, 9H, CH₃), 1.11 (d, J=6.0 Hz, 3H, CH₃), 1.06 (d, J=6.0 Hz, 3H, CH₃), 0.57 (d, J=6.0 Hz, 3H, CH₃), 0.43 (d, J=6.0 Hz, 3H, CH₃).

Synthesis of Lig¹⁰Zr(OtBu)₂

Lig¹⁰H₂ (49 mg, 0.09 mmol) was dissolved in 1 mL of toluene and added dropwise to a stirring solution of Zr(OtBu)₄ (34 mg, 0.09 mmol) in 1 mL of toluene. The reaction mixture was stirred at room temperature and after 2 hours the solvent was removed under vacuum, and the solid was washed with 1 mL of pentane and dried, yielding a yellow solid quantitatively.

¹H NMR (C₆D₆, 400 MHz): δ=7.86 (s, 1H, NCH), 7.80 (d, 1H, J=1.0 Hz, ArH), 7.73 (d, 1H, J=1.0 Hz, ArH), 7.72 (s, 1H, NCH), 7.12-7.07 (m, 4H, ArH), 6.94-6.89 (m, 2H, ArH), 4.21 (d, J=13.0 Hz, 1H, CH), 3.61 (d, J=13.0 Hz, 1H, CH), 1.78 (s, 9H, CH₃), 1.65 (s, 9H, CH₃), 1.30 (s, 9H, CH₃), 1.27 (s, 9H, CH₃), 1.20 (s, 9H, CH₃), 0.69 (s, 9H, CH₃).

Example 11 Synthesis of the Ligand Precursor (Lig¹¹H₂)

Lig¹¹H₂ was prepared in quantitative yield according to the procedure of Example 1, using 2-aminobenzylamine (1.00 gram, 8.19 mmol) and 3-tert-butylsalicylaldehyde (2.92 gram, 16.38 mmol).

¹H NMR (CDCl₃, 400 MHz): δ=8.58 (s, 1H, NCH), 8.51 (s, 1H, NCH), 7.45-7.04 (m, 8H, ArH), 6.87 (t, 1H, J=7.6 Hz, ArH), 6.76 (t, 1H, J=7.6 Hz, ArH), 4.95 (s, 2H, CH₂), 1.47 (s, 9H, CH₃), 1.39 (s, 9H, CH₃).

Synthesis of Lig¹¹ HfBn₂

Lig¹¹H₂ (68 mg, 0.15 mmol) was dissolved in 1 mL of toluene and added dropwise to a stirring solution of HfBn₄ (84 mg, 0.15 mmol) in 1 mL of toluene. The color of the solution changed to dark orange. The reaction mixture was stirred at room temperature and after 2 hours the solvent was removed under vacuum, and the solid was washed with 1 mL of pentane and dried, yielding an orange solid quantitatively.

¹H NMR (C₆D₆, 400 MHz): δ=8.10 (s, 1H, NCH), 7.68 (s, 1H, NCH), 7.48-7.43 (m, 5H, ArH), 7.05-6.44 (m, 15H, ArH), 4.10 (d, J=13.8 Hz, 1H, CH), 3.41 (d, J=13.8 Hz, 1H, CH), 2.81 (d, J=8.3 Hz, 1H, CH), 2.71 (d, J=8.3 Hz, 1H, CH), 2.03 (d, J=10.4 Hz, 1H, CH), 1.61 (s, 9H, CH₃), 1.53 (s, 9H, CH₃), 1.06 (d, J=10.4 Hz, 1H, CH).

Example 12 Synthesis of the Ligand Precursor (Lig¹²H₂)

Lig¹²H₂ was prepared in quantitative yield according to the procedure of Example 1, using 2-aminobenzylamine (0.28 gram, 2.33 mmol) and 3-tert-butyl-5-chlorosalicylaldehyde (0.99 gram, 4.66 mmol).

¹H NMR (CDCl₃, 400 MHz): δ=8.48 (s, 1H, NCH), 8.41 (s, 1H, NCH), 7.42-7.32 (m, 5H, ArH), 7.21 (d, 1H, J=2.4 Hz, ArH), 7.19 (d, 1H, J=2.4 Hz, ArH), 7.01 (d, 1H, J=2.4 Hz, ArH), 4.94 (s, 2H, CH₂), 1.45 (s, 9H, CH₃), 1.35 (s, 9H, CH₃).

Synthesis of Lig¹²HfBn₂

Lig¹²H₂ (80 mg, 0.16 mmol) was dissolved in 1 mL of toluene and added dropwise to a stirring solution of HfBn₄ (85 mg, 0.16 mmol) in 1 mL of toluene. The color of the solution changed to dark orange. The reaction mixture was stirred at room temperature and after 2 hours the solvent was removed under vacuum, and the solid was washed with 1 mL of pentane and dried, yielding an orange solid quantitatively.

¹H NMR (C₆D₆, 400 MHz): δ=7.74 (s, 1H, NCH), δ=7.55 (s, 1H, NCH), 7.51 (d, 1H, J=1.9 Hz, ArH), 7.48 (d, 1H, J=1.9 Hz, ArH), 7.10-6.61 (m, 16H, ArH), 4.95 (d, J=10.3 Hz, 1H, CH), 3.47 (d, J=10.3 Hz, 1H, CH), 2.61 (d, J=8.5 Hz, 1H, CH), 2.55 (d, J=8.5 Hz, 1H, CH), 2.01 (d, J=9.3 Hz, 1H, CH), 1.39 (s, 9H, CH₃), 1.33 (s, 9H, CH₃), 0.92 (d, J=9.3 Hz, 1H, CH).

Example 13 Synthesis of the Ligand Precursor (Lig¹³H₂)

Lig¹³H₂ was prepared in quantitative yield according to the procedure of Example 1, using 2-aminobenzylamine (0.29 gram, 2.35 mmol) and 3-tert-butyl-5-methoxysalicylaldehyde (0.98 gram, 4.71 mmol).

¹H NMR (CDCl₃, 400 MHz): δ=8.53 (s, 1H, NCH), 8.48 (s, 1H, NCH), 7.45-7.12 (m, 4H, ArH), 7.05 (d, 1H, J=2.5 Hz, ArH), 6.93 (d, 1H, J=2.5 Hz, ArH), 6.70 (d, 1H, J=2.5 Hz, ArH), 6.49 (d, 1H, J=2.5 Hz, ArH), 4.95 (s, 2H, CH₂), 3.78 (s, 3H, OCH₃), 3.70 (s, 3H, OCH₃), 1.46 (s, 9H, CH₃), 1.37 (s, 9H, CH₃).

Synthesis of Lig¹³HfBn₂

Lig¹³H₂ (86 mg, 0.17 mmol) was dissolved in 1 mL of toluene and added dropwise to a stirring solution of HfBn₄ (93 mg, 0.17 mmol) in 1 mL of toluene. The color of the solution changed to dark orange. The reaction mixture was stirred at room temperature and after 2 hours the solvent was removed under vacuum, and the solid was washed with 1 mL of pentane and dried, yielding an orange solid quantitatively.

Example 15 Synthesis of the Ligand Precursor (Lig¹⁵H₂)

Lig¹⁵H₂ was prepared in quantitative yield according to the procedure of Example 1, using 2-aminobenzylamine (0.31 gram, 2.57 mmol) and 3-phenylsalicylaldehyde (1.02 gram, 5.15 mmol).

¹H NMR (CDCl₃, 400 MHz): δ=8.63 (s, 1H, NCH), 8.52 (s, 1H, NCH), 7.67-7.14 (m, 14H, ArH), 7.02 (t, 1H, J=7.6 Hz, ArH), 6.90 (t, 1H, J=7.6 Hz, ArH), 4.95 (s, 2H, CH₂).

Example 16 Synthesis of the Ligand Precursor (Lig¹⁶H₂)

Lig¹⁶H₂ was prepared in quantitative yield according to the procedure of Example 1, using 2-aminobenzylamine (0.09 gram, 0.75 mmol) and 3-(1-adamantyl)-5-methylsalicylaldehyde (0.40 gram, 1.50 mmol).

¹H NMR (CDCl₃, 200 MHz): δ=8.47 (s, 1H, NCH), 8.33 (s, 1H, NCH), 7.39-6.70 (m, 8H, ArH), 4.67 (s, 2H, CH₂), 2.27 (s, 3H, CH₃), 2.20 (s, 3H, CH₃), 2.12-1.95 (m, 18H, adamantyl), 1.75 (bs, 12H, adamantyl).

Synthesis of Lig¹⁶HfBn₂

Lig¹⁶H₂ (51 mg, 0.08 mmol) was dissolved in 1 mL of toluene and added dropwise to a stirring solution of HfBn₄ (44 mg, 0.08 mmol) in 1 mL of toluene. The color of the solution changed to dark orange. The reaction mixture was stirred at room temperature and after 2 hours the solvent was removed under vacuum, and the solid was washed with 1 mL of pentane and dried, yielding an orange solid quantitatively.

Example 17 Synthesis of the Ligand Precursor (Lig¹⁷H₂)

Lig¹⁷H₂ was prepared in quantitative yield according to the procedure of Example 1, using 2-aminobenzylamine (0.10 gram, 0.81 mmol) and 3-(2-adamantyl)-5-methylsalicylaldehyde (0.44 gram, 1.62 mmol).

¹H NMR (CDCl₃, 400 MHz): δ=8.47 (s, 1H, NCH), 8.41 (s, 1H, NCH), 7.49-7.35 (m, 4H, ArH), 7.09 (d, 1H, J=1.9 Hz, ArH), 7.08 (d, 1H, J=1.9 Hz, ArH), 7.00 (d, 1H, J=2.1 Hz, ArH), 6.78 (d, 1H, J=2.1 Hz, ArH), 4.90 (s, 2H, CH₂), 2.32 (s, 3H, CH₃), 2.26 (s, 3H, CH₃), 2.05-1.63 (m, 30H, 2-adamantyl).

Example 18 Synthesis of the Ligand Precursor (Lig¹⁸H₂)

Lig¹⁸H₂ was prepared in quantitative yield according to the procedure of Example 1, using 2-aminobenzylamine (0.89 gram, 7.32 mmol) and 3-(1-adamantyl)-5-chlorosalicylaldehyde (4.25 gram, 14.64 mmol).

¹H NMR (CDCl₃, 400 MHz): δ=8.46 (s, 1H, NCH), 8.40 (s, 1H, NCH), 7.39-7.27 (m, 5H, ArH), 7.17 (d, 1H, J=2.0 Hz, ArH), 7.14 (d, 1H, J=2.0 Hz, ArH), 6.97 (d, 1H, J=2.0 Hz, ArH), 4.93 (s, 2H, CH₂), 2.17-2.03 (m, 18H, adamantyl), 1.79-1.73 (m, 12H, adamantyl).

Example 19 Synthesis of the Ligand Precursor (Lig¹⁹H₂)

Lig¹⁹H₂ was prepared in quantitative yield according to the procedure of Example 1, using 2-aminobenzylamine (0.17 gram, 1.38 mmol) and 3-(1-adamantyl)-5-methoxysalicylaldehyde (0.79 gram, 2.76 mmol).

¹H NMR (CDCl₃, 400 MHz): δ=8.51 (s, 1H, NCH), 8.45 (s, 1H, NCH), 7.44-7.12 (m, 4H, ArH), 6.99 (d, 1H, J=2.1 Hz, ArH), 6.86 (d, 1H, J=2.1 Hz, ArH), 6.69 (d, 1H, J=2.1 Hz, ArH), 6.45 (d, 1H, J=2.1 Hz, ArH), 4.95 (s, 2H, CH₂), 3.77 (s, 3H, OCH₃), 3.69 (s, 3H, OCH₃), 2.20-2.03 (m, 18H, adamantyl), 1.79-1.74 (m, 12H, adamantyl).

Synthesis of Lig¹⁹HfBn₂

Lig¹⁹H₂ (67 mg, 0.10 mmol) was dissolved in 1 mL of toluene and added dropwise to a stirring red solution of HfBn₄ (55 mg, 0.10 mmol) in 1 mL of toluene. The color of the solution changed to dark orange. The reaction mixture was stirred at room temperature and after 2 hours the solvent was removed under vacuum, and the solid was washed with 1 mL of pentane and dried, yielding an orange solid quantitatively.

Example 20 Synthesis of the Ligand Precursor (Lig²⁰H₂)

Lig²⁰H₂ was prepared in quantitative yield according to the procedure of Example 1, using 2-aminobenzylamine (0.22 gram, 1.83 mmol) and 3-(2-adamantyl)-5-chlorosalicylaldehyde (1.06 gram, 3.66 mmol).

Example 21 Synthesis of the Ligand Precursor Lig²¹H₂)

Lig²¹H₂ was prepared in quantitative yield according to the procedure of Example 1, using 2-aminobenzylamine (0.10 gram, 0.79 mmol) and 3,5-dicumylsalicylaldehyde (0.57 gram, 0.20 mmol).

Example 22 Synthesis of the Ligand Precursor (Lig²²H₂)

A solution of 3,5-dichlorosalicylaldehyde (0.21 gram, 1.01 mmol) in cold methanol (20 mL) was added very slowly to a solution of 2-aminobenzylamine (0.13 gram, 1.01 mmol) in methanol (20 mL) at 0° C. and the reaction mixture was stirred for 5 hours until a bright yellow solid appeared. The solid was collected by filtration, washed with cold methanol and dried. A solution of this mono-substituted intermediate material (0.06 gram, 0.27 mmol) in methanol (20 mL) was added to a solution of 3,5-di-tert-butylsalicylaldehyde (0.08 gram, 0.27 mmol) in methanol (20 mL) and the reaction mixture was stirred at room temperature for 24 hours. The orange solid was collected by filtration, washed with cold methanol and dried yielding the ligand precursor quantitatively.

¹H NMR (CDCl₃, 400 MHz): δ=8.53 (s, 1H, NCH), 8.40 (s, 1H, NCH), 7.49 (d, 1H, J=1.9 Hz, ArH), 7.42-7.39 (m, 4H, ArH), 7.33 (d, 1H, J=1.9 Hz, ArH), 7.18 (d, 1H, J=1.9 Hz, ArH), 7.02 (d, 1H, J=1.9 Hz, ArH), 4.96 (s, 2H, CH₂), 1.50 (s, 9H, CH₃), 1.32 (s, 9H, CH₃).

Example 23-28 Prepared According Procedure of Example 22

Lig²³H₂: ¹H NMR (CDCl₃, 400 MHz): δ=8.51 (s, 1H, NCH), 8.37 (s, 1H, NCH), 7.61 (d, 1H, J=1.9 Hz, ArH), 7.49 (d, 1H, J=1.9 Hz, ArH), 7.44-7.39 (m, 3H, ArH), 7.18-7.10 (m, 3H, ArH), 4.97 (s, 2H, CH₂), 1.49 (s, 9H, CH₃), 1.30 (s, 9H, CH₃).

Lig²⁵H₂: Lig²⁵H₂ was prepared in quantitative yield according to the procedure of Example 22, using 2-(((aminomethyl)phenylimino)methyl)-4,6-dichlorophenol (0.38 gram, 1.28 mmol) and 3-(2-adamantyl)-5-methylsalicylaldehyde (0.35 gram, 1.28 mmol).

¹H NMR (CDCl₃, 400 MHz): δ=8.49 (s, 1H, NCH), 8.40 (s, 1H, NCH), 7.46 (d, 1H, J=2.3 Hz, ArH), 7.36 (d, 1H, J=2.3 Hz, ArH), 7.35-7.10 (m, 4H, ArH), 7.03 (d, 1H, J=1.8 Hz, ArH), 6.82 (d, 1H, J=1.8 Hz, ArH), 4.91 (s, 2H, CH₂), 2.24 (s, 3H, CH₃), 2.09 (bs, 6H, adamantyl), 2.04 (bs, 3H, adamantyl), 1.75 (bs, 6H, adamantyl).

Synthesis of Lig²⁵HfBn₂

Lig²⁵H₂ (52 mg, 0.10 mmol) was dissolved in 1 mL of toluene and added dropwise to a stirring solution of HfBn₄ (52 mg, 0.10 mmol) in 1 mL of toluene. The color of the solution changed to dark orange. The reaction mixture was stirred at room temperature and after 2 hours the solvent was removed under vacuum, and the solid was washed with 1 mL of pentane and dried, yielding an orange solid quantitatively.

Lig²⁶H₂:

Lig²⁶H₂ was prepared in quantitative yield according to the procedure of Example 22, using 2-(((aminomethyl)phenylimino)methyl)-4,6-dibromophenol (0.32 gram, 0.83 mmol) and 3-(2-adamantyl)-5-methylsalicylaldehyde (0.22 gram, 0.83 mmol).

¹H NMR (CDCl₃, 400 MHz): δ=8.44 (s, 1H, NCH), 8.40 (s, 1H, NCH), 7.74 (d, 1H, J=2.3 Hz, ArH), 7.44 (d, 1H, J=2.3 Hz, ArH), 7.35 (m, 2H, ArH), 7.15 (m, 2H, ArH), 7.03 (d, 1H, J=1.8 Hz, ArH), 6.75 (d, 1H, J=1.8 Hz, ArH), 4.90 (s, 2H, CH₂), 2.24 (s, 3H, CH₃), 2.09 (bs, 6H, adamantyl), 2.04 (bs, 3H, adamantyl), 1.75 (bs, 6H, adamantyl).

Molecular structure as determined by single crystal X-ray diffraction in ORTEP format of five of the imino-phenylene-alkylene-imino salen ligand catalysts, in which alkylene moiety Y is methylene, are shown in FIGS. 1, 2, 3, 4, 5, and 6.

FIG. 1 shows the X-ray crystal structure of the imino-benzylimino salen catalyst according to Example 4, where the metal is Ti and where the benzyl groups are replaced by O-iPr according to the following formula:

The structure in FIG. 1 is shown with the isopropyl group of each of the isopropoxy groups omitted for clarity.

FIG. 2 shows the X-ray crystal structure of the imino-benzylimino salen catalyst according to Example 10, where the metal is Zr and where the benzyl groups are replaced by O-tBu according to the following formula:

The structure in FIG. 2 is shown with the tertiary butyl group of each of the tertiary butoxy groups omitted for clarity.

FIG. 3 shows the X-ray crystal structure of the imino-benzylimino salen catalyst according to Example 10, where the metal is Ti and where the benzyl groups are replaced by O-iPr according to the following formula:

The structure in FIG. 3 is shown with the isopropyl group of each of the isopropoxy groups omitted for clarity.

FIG. 4 shows the X-ray crystal structure of the imino-benzylimino salen catalyst according to Example 10, where the metal is Hf, according to the following formula:

FIG. 5 shows the X-ray crystal structure of the imino-benzylimino salen catalyst shown in FIG. 4 with the phenyl rings of each of the benzyl groups omitted for clarity.

FIG. 6 shows the X-ray crystal structure of the imino-benzylimino salen catalyst according to Example 25, where the metal is Ti and where the benzyl groups are replaced by O-iPr, according to the following formula:

The structure in FIG. 6 is shown with the isopropyl group of each of the isopropoxy groups omitted for clarity. As the FIGs. show, the imino-phenylene-alkylene-imino salen ligands according to some embodiments according to the invention produce catalysts having a fac-mer wrapping conformation.

Examples 29 and 30 Synthesis of polypropylene using Lig¹⁰HfBn₂

MAO from Albemarle (30% by weight in toluene) was dried under vacuum at elevated temperature (generally 60 to 80° C.) overnight. The solid product was collected and used in the following reactions without further alteration.

Example 29: Solid MAO (359 mg), Lig¹⁰HfBn₂ (10 mg, 0.011 mmol), and a stir bar were added to a PARR bomb chilled to −85° C. Condensed propylene (25.5 g, 606 mmol) was poured into the PARR bomb. The bomb was sealed and set to stir at room temperature overnight. The bomb was vented and polymer (1.24 g) was collected. DSC: 1^(st) melt: 157° C.; 2^(nd) melt: 155° C. Example 30: Solid MAO (341 mg), Lig¹⁰HfBn₂ (11 mg, 0.012 mmol), and a stir bar were added to a PARR bomb chilled to −85° C. Condensed propylene (25.5 g, 606 mmol) was poured into the bomb. The bomb was sealed, placed in an oil bath and heated to 70° C. The reaction was left to stir for 1 hour. The bomb was vented and polymer (0.54 g) was collected. DSC: 1^(st) melt: 151° C.; 2 ^(11d) melt: 152° C.

Additional Syntheses of Polypropylene

A series of polymerization reactions were conducted using neat propylene and 500 eq. MAO at room temperature (25° C.) for 13 hours. These data are shown in Table 2.

TABLE 2 Catalyst C₃₌ Polymer T_(melt) ΔH [mmmm] Example M used (g) obtained (g) (° C.) (J/g)) (wt %) 1 Hf 8.12 0.52 153.5 94.0 90.5 1 Ti 8.13 0.651 132.4 14.7 — (very broad) 2 Hf 6.78 0.188 148.7 11.6 — 3 Hf 7.07 0.83 151.2 53.5 81.4 4 Hf 9.47 0.67 153.1 52.9 85.3− 4 Zr 9.72 0.536 137/149 5.9 — 5 Hf 9.39 0.108 143.8 29.8 63.9 6 Hf 9.96 0.135 147.4 10.0 — 8 Hf 8.46 None — — — 10 Hf 9.37 0.28 165.8 94.3 98.77 10 Zr 7.04 0.122 160.1 15.9 — 10 Ti 9.47 0.22 NC — — 13 Hf 7.28 0.22 155.6 10.9 — 16 Hf 8.21 0.116 161.6 86.7 98.73 19 Hf 7.96 1.58 159.7 95.4 99.4 19 Zr 7.15 0.30 — — — 21 Hf 2.32 0.1 NC NC ~83 25 Hf 8.37 3.23 149.8 — 96.35 26 Hf 11.7 1.14 153.18 73.36 97.75 27 Hf 6.95 0.29 157.04 77.38 95.60

As these data show, the catalyst compounds, catalyst systems, and polymerization processes disclosed herein provide novel and improved catalyst and systems for the polymerization of olefins, which produce polymers having improved properties, such as high polymer melting point and highly isotactic polymers.

The crystallographic techniques indicate that the appended ring system or systems are oriented fac-mer. The catalysts according to the instant disclosure are believed to have a structure which provides a broad corridor for the polymeryl moiety to reside and for the monomer to insert during the polymerization process. As such, catalysts according to embodiments of the instant disclosure provide for an ability to control one or more characteristics of polymerization, tacticity, comonomer insertion, and the like. All documents described herein are incorporated by reference herein, including any priority documents and/or testing procedures to the extent they are not inconsistent with this text, provided however that any priority document not named in the initially filed application or filing documents is NOT incorporated by reference herein. As is apparent from the foregoing general description and the specific embodiments, while forms according to the invention have been illustrated and described, various modifications can be made without departing from the spirit and scope according to the invention. Accordingly, it is not intended that the invention be limited thereby. 

What is claimed is:
 1. A catalyst compound represented by the formula:

comprising [O¹,N¹,N²]—[N¹,N²,O²] in a fac-mer arrangement or a mer-fac arrangement or a fac-fac arrangement; wherein each solid line represents a covalent bond and each dashed line represents a bond having varying degrees of covalency and a varying degree of coordination; wherein M is a Group 4, 5 or 6 transition metal; wherein N¹ and N² are nitrogen and O¹ and O² are oxygen; wherein each of X¹ and X² is, independently, a univalent C₁ to C₂₀ hydrocarbyl radical, a functional group comprising elements from Groups 13-17 of the periodic table of the elements, or X¹ and X² join together to form a C₄ to C₆₂ cyclic or polycyclic ring structure; wherein Y comprises an sp³ carbon directly bonded to N² and is selected from the group consisting of divalent C₁ to C₄₀ hydrocarbyl radicals, divalent functional groups comprising elements from Groups 13-17 of the periodic table of the elements, and combinations thereof; wherein each of R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, R¹¹ and R¹² is independently, a hydrogen, a C₁-C₄₀ hydrocarbyl radical, a functional group comprising elements from Group 13-17 of the periodic table of the elements, or two or more of R¹ to R¹² may independently join together to form a C₄ to C₆₂ cyclic or polycyclic ring structure.
 2. The catalyst compound of claim 1, wherein [O¹,N¹,N²]—[N¹,N²,O²] are in a fac-mer arrangement.
 3. The catalyst compound of claim 1, wherein M is Ti, Hf or Zr.
 4. The catalyst compound of claim 1, wherein X¹ and X² are each a benzyl radical.
 5. The catalyst compound of claim 1, wherein each R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, R¹¹, and R¹² is, independently, hydrogen, a halogen, or a C₁ to C₁₀ hydrocarbyl radical.
 6. The catalyst compound of claim 1, wherein the sp³ carbon directly bonded to N² is a benzylic carbon.
 7. The catalyst compound of claim 1, wherein Y is a divalent aliphatic radical having from 1 to 10 carbon atoms.
 8. The catalyst compound of claim 1, wherein R¹¹ and R¹² join to form a phenylene ring directly bonded to N² and Y to form an imino-phenylene-alkylene-imino bridged salen compound, represented by the formula:

wherein each of R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, R¹³, R¹⁴, R¹⁵, and R¹⁶ is independently, a hydrogen, a C₁-C₄₀ hydrocarbyl radical, a functional group comprising elements from Group 13-17 of the periodic table of the elements, or two or more of R¹ to R¹⁰ and R¹³ to R¹⁶ may independently join together to form a C₄ to C₆₂ cyclic or polycyclic ring structure.
 9. The catalyst compound of claim 8, represented by the formula:

wherein each of R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, R¹³, R¹⁴, R¹⁵, R¹⁶, R¹⁷, and R¹⁸ is, independently, a hydrogen, a C₁-C₄₀ hydrocarbyl radical, a functional group comprising elements from Group 13-17 of the periodic table of the elements, or two or more of R¹ to R¹⁰ and R¹³ to R¹⁸ may independently join together to form a C₄ to C₆₂ cyclic or polycyclic ring structure.
 10. The catalyst compound of claim 9, wherein: X¹ and X² are benzyl radicals; at least one of R¹, R², R⁴, R⁵, R⁷, and R⁸ are independently selected from the group consisting of: C₁-C₁₀ alkyl, C₁-C₁₀ cycloalkyl, C₁-C₁₀ alkenyl C₁-C₁₀ alkoxy, aryl substituted C₁-C₁₀ alkyl, C₁-C₁₀ aryl, halo, and combinations thereof; and R³, R⁶, R⁹, R¹⁰, R¹³, R¹⁴, R¹⁵, R¹⁶, R¹⁷ and R¹⁸ are hydrogen.
 11. The catalyst compound of claim 10, wherein at least one of R¹, R², R⁴, R⁵, R⁷, and R⁸ are independently selected from the group consisting of: methyl, ethyl, isopropyl, isobutyl, tertiary-butyl, isopentyl, 2-methyl-2-phenylethyl; methoxy, benzyl, adamantyl, chloro, bromo, iodo, and combinations thereof.
 12. The catalyst compound of claim 9, wherein R² and R⁴ are identical, R⁵ and R⁷ are identical, or a combination thereof.
 13. The catalyst compound of claim 8, wherein R¹⁴ and R¹⁵ join to form a 2,3-naphthalenylene ring directly bonded to N² and Y to form an imino-naphthalenylene-alkylene-imino bridged salen compound, represented by the formula:

wherein each of R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, R¹³, R¹⁶, R¹⁹, R²⁰, R²¹, and R²² is independently, a hydrogen, a C₁-C₄₀ hydrocarbyl radical, a functional group comprising elements from Group 13-17 of the periodic table of the elements, or two or more of R¹ to R¹⁰ and R¹³ to R¹⁶ may independently join together to form a C₄ to C₆₂ cyclic or polycyclic ring structure.
 14. A catalyst system comprising: an activator and a catalyst compound represented by the formula:

wherein N¹ and N² are nitrogen and O¹ and O² are oxygen and comprising [O¹,N¹,N²]—[N¹,N²,O²] in a fac-mer arrangement, or a mer-fac arrangement or a fac-fac arrangement, or wherein activation of the catalyst compound rearranges [O¹,N¹,N²]—[N¹,N²,O²] into a fac-mer arrangement, or a mer-fac arrangement or a fac-fac arrangement; wherein each solid line represents a covalent bond and each dashed line represents a bond having varying degrees of covalency and a varying degree of coordination; wherein M is a Group 4, 5 or 6 transition metal; wherein each of X¹ and X² is, independently, a univalent C₁ to C₂₀ hydrocarbyl radical, a functional group comprising elements from Groups 13-17 of the periodic table of the elements, or X¹ and X² join together to form a C₄ to C₆₂ cyclic or polycyclic ring structure; wherein Y comprises an sp³ carbon directly bonded to N² and is selected from the group consisting of divalent C₁ to C₄₀ hydrocarbyl radicals, divalent functional groups comprising elements from Groups 13-17 of the periodic table of the elements, and combinations thereof; wherein each of R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, R¹¹, and R¹² is independently, a hydrogen, a C₁-C₄₀ hydrocarbyl radical, a functional group comprising elements from Group 13-17 of the periodic table of the elements, or two or more of R¹ to R¹² may independently join together to form a C₄ to C₆₂ cyclic or polycyclic ring structure.
 15. The catalyst system of claim 14, comprising [O¹,N¹,N²]—[N¹,N²,O²] in a fac-mer arrangement or a mer-fac arrangement, or wherein activation of the catalyst compound rearranges [O¹,N¹,N²]—[N¹,N²,O²] into a fac-mer arrangement or a mer-fac arrangement.
 16. The catalyst system of claim 14, wherein the activator comprises alumoxane, a non-coordinating anion activator, or a combination thereof.
 17. The catalyst system of claim 14, wherein the activator comprises alumoxane and the alumoxane is present at a ratio of 1 mole aluminum or more per mole of catalyst compound.
 18. The catalyst system of claim 14, wherein the activator is represented by the formula: (Z)_(d) ⁺(A^(d−)) wherein Z is (L-H), or a reducible Lewis Acid, wherein L is a neutral Lewis base, H is hydrogen and (L-H)⁺ is a Bronsted acid; wherein A^(d−) is a non-coordinating anion having the charge d⁻; and d is an integer from 1 to
 3. 19. The catalyst system of claim 14, wherein the activator is represented by the formula: (Z)_(d) ⁺(A^(d−)) wherein A^(d−) is a non-coordinating anion having the charge d⁻; wherein d is an integer from 1 to 3, and wherein Z is a reducible Lewis acid represented by the formula: (Ar₃C⁺), where Ar is aryl radical, an aryl radical substituted with a heteroatom, an aryl radical substituted with one or more C₁ to C₄₀ hydrocarbyl radicals, an aryl radical substituted with one or more functional groups comprising elements from Groups 13-17 of the periodic table of the elements, or a combination thereof.
 20. A process to activate a catalyst system, comprising combining an activator with a catalyst compound represented by the formula:

wherein N¹ and N² are nitrogen and O¹ and O² are oxygen and comprising [O¹,N¹,N²]—[N¹,N²,O²] in a fac-mer arrangement or a mer-fac arrangement or a fac-fac arrangement, or wherein activation rearranges [O¹,N¹,N²]—[N¹,N²,O²] into a fac-mer arrangement or a mer-fac arrangement or a fac-fac arrangement; wherein M is a Group 4, 5 or 6 transition metal; wherein each of X¹ and X² is, independently, a univalent C₁ to C₂₀ hydrocarbyl radical, a functional group comprising elements from Groups 13-17 of the periodic table of the elements, or X¹ and X² join together to form a C₄ to C₆₂ cyclic or polycyclic ring structure; wherein Y comprises an sp³ carbon directly bonded to N² and is selected from the group consisting of divalent C₁ to C₄₀ hydrocarbyl radicals, divalent functional groups comprising elements from Groups 13-17 of the periodic table of the elements, and combinations thereof and wherein each of R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, R¹¹, and R¹² is independently, a hydrogen, a C₁-C₄₀ hydrocarbyl radical, a functional group comprising elements from Group 13-17 of the periodic table of the elements, or two or more of R¹ to R¹² may independently join together to form a C₄ to C₆₂ cyclic or polycyclic ring structure.
 21. The process of claim 20, comprising [O¹,N¹,N²]—[N¹,N²,O²] in a fac-mer arrangement or a mer-fac arrangement, or wherein activation rearranges [O¹,N¹,N²]—[N¹,N²,O²] into a fac-mer arrangement or a mer-fac arrangement;
 22. A process to polymerize olefins comprising: contacting one or more olefins with a catalyst system at polymerization conditions to produce a polyolefin, the catalyst system comprising an activator and a catalyst compound represented by the formula:

wherein M is a Group 4, 5 or 6 transition metal; wherein N¹ and N² are nitrogen and O¹ and O² are oxygen; wherein each of X¹ and X² is, independently, a univalent C₁ to C₂₀ hydrocarbyl radical, a functional group comprising elements from Groups 13-17 of the periodic table of the elements, or X¹ and X² join together to form a C₄ to C₆₂ cyclic or polycyclic ring structure; wherein Y comprises an sp³ carbon directly bonded to N² and is selected from the group consisting of divalent C₁ to C₄₀ hydrocarbyl radicals, divalent functional groups comprising elements from Groups 13-17 of the periodic table of the elements, and combinations thereof; and wherein each of R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, R¹¹, and R¹² is independently, a hydrogen, a C₁-C₄₀ hydrocarbyl radical, a functional group comprising elements from Group 13-17 of the periodic table of the elements, or two or more of R¹ to R¹² may independently join together to form a C₄ to C₆₂ cyclic or polycyclic ring structure.
 23. The process of claim 22, comprising [O¹,N¹,N²]—[N¹,N²,O²] in a fac-mer arrangement or a mer-fac arrangement; or wherein activation rearranges [O¹,N¹,N²]—[N¹,N²,O²] into a fac-mer arrangement or a mer-fac arrangement.
 24. The process of claim 22, wherein the polymerization conditions comprise a temperature of from about 0° C. to about 300° C., a pressure from about 0.35 MPa to about 10 MPa, and a time from about 0.1 minutes to about 24 hours.
 25. The process of claim 22, wherein the polyolefin comprises at least 50 mole % propylene having a concentration of meso isotactic pentads [mmmm] of greater than or equal to about 90 wt %, based on the total weight of the polymer.
 26. Isotactic polypropylene obtained by the process of claim 22 and having a melting point greater than 160° C. 